Unit 01
adventure, arrive, backpack, beach, bright, captain, celebrate, country, culture, direction, experience, fantastic, foreign, international, leave, museum, palace, schedule, tour, tradition

Unit 02
act, bake, cage, cartoon, collect, costume, exercise, favorite, festival, instrument, magazine, musician, participate, photo, pleasure, puzzle, recipe, travel, volunteer, walk

Unit 03
alarm, asleep, awake, breathe, clothes, diet, dish, feed, greet, ill, join, laugh, moment, noisy, question, remember, trash, wait, wear, worry

Unit 04
bark, beautiful, change, clean, dangerous, desert, environment, field, forest, improve, lake, nest, plant, pollution, protect, season, toward, wild, wooden, world

Unit 05
activity, actually, balance, careful, courage, creative, especially, friendly, gesture, habit, kind, lazy, mental, mysterious, person, popular, quiet, rude, strong, unique
Review 01

Unit 06
adult, advise, borrow, build, corner, decide, effort, exchange, finish, forward, invite, letter, mistake, need, office, price, report, traffic, week, work

Unit 07
ahead, answer, award, class, college, difficult, elementary, explain, fiction, get, holiday, know, mind, opinion, play, problem, share, student, vote, year

Unit 08
afraid, blind, comfortable, enjoy, enough, feel, harmony, hungry, maybe, muscle, nervous, plate, poem, pure, reduce, shake, skin, sweet, touch, view

Unit 09
bath, below, break, child, diary, fair, floor, guest, hometown, live, midnight, neighbor, own, quite, safe, thing, town, upstairs, visit, without

Unit 10
avoid, battle, beat, blood, brave, challenge, dead, evil, forever, history, kingdom, machine, nation, occur, place, prepare, rule, ship, symbol, tough
Review 02

Unit 11
accept, attend, between, bring, call, communicate, deliver, donate, favor, forgive, gather, leader, master, modern, repeat, speak, suddenly, teach, together, welcome

Unit 12
access, board, character, choose, during, fight, find, impossible, limit, match, miss, overcome, pity, prize, ready, signal, speed, twice, useful, wish

Unit 13
add, calendar, circle, count, degree, empty, half, height, inside, learn, lesson, math, practice, sign, spend, straight, temperature, thousand, weigh, wrong

Unit 14
branch, breath, chance, clear, control, create, dry, earth, factory, garbage, important, jungle, leaf, nature, pond, shade, silent, storm, weather, yard

Unit 15
alone, birth, cousin, daughter, elderly, forget, friendship, future, lovely, meal, ordinary, parent, past, raise, son, task, vacation, watch, wise, wonderful
Review 03

Unit 16
address, classical, company, court, dentist, design, director, fashion, food, judge, language, library, mayor, plan, police, public, recommend, speech, therefore, uniform

Unit 17
beside, blow, bug, climb, danger, flood, giant, grand, hill, hunt, mud, ocean, reach, recycle, remove, rock, shadow, solar, tiny, wonder

Unit 18
among, best, complain, event, excited, guide, hurt, lead, lonely, present, punish, receive, social, sure, treat, trust, understand, virtual, wave, write

Unit 19
believe, cheer, confident, cry, effect, handsome, heavy, helpful, honest, listen, main, pain, perfect, proud, scary, secret, serious, shape, upset, weak

Unit 20 bend, care, catch, deep, disease, failure, happen, headache, health, look, lose, possible, powerful, seem, stretch, trouble, use, voice, warn, wash
Review 04

Unit 21
agree, along, become, chat, contact, dream, drink, famous, follow, hope, keep, lend, luck, mention, necessary, pardon, praise, special, spirit, surprise

Unit 22
buy, cheap, delicious, different, dinosaur, emperor, far, free, global, interesting, map, paint, plane, point, reason, ride, shine, statue, want, wide

Unit 23
bone, carry, cross, cure, example, face, finger, float, human, hurry, knee, medicine, narrow, pull, push, respond, sweat, thirsty, throat, tongue

Unit 24
boil, bottle, bowl, candle, dessert, dictionary, flat, fresh, late, light, meat, pattern, pet, pick, roof, sink, spread, stair, wake, waste

Unit 25
ask, block, complete, copy, enter, exam, fail, goal, grade, hard, manners, mean, pass, poet, process, record, result, right, sentence, subject
Review 05

Unit 26
busy, city, coat, coin, expensive, fix, fortune, instead, junk, minute, noon, pay, quick, sale, save, search, slice, subway, toy, trade

Unit 27
artist, comic, correct, draw, drive, film, fly, hang, hero, horn, lift, loud, mix, science, skill, strike, swim, talent, throw, win

Unit 28
burn, close, crash, drop, excuse, fall, final, hold, jail, mad, sore, spill, stress, tear, terrible, thief, tired, trick, trip, yell

Unit 29
announce, central, express, gate, government, introduce, life, mall, message, move, officer, peace, polite, rich, select, service, society, solve, structure, temple

Unit 30
camp, exciting, explore, funny, golden, grow, island, last, layer, matter, melt, recently, rice, seed, sick, simple, space, stream, surface, valley
Review 06