4000EssentialEnglishWords1–AnswerKey1Unit1Exercise1PartA1
aPartB1
dExercise21
bReadingComprehension1
Thelionsawhisownfaceinthewater
Unit2Exercise1PartA1
a,dPartB1
create2
adventure3
approach4
secret5
projectExercise21
aReadingComprehension1
MiaandLizwentintothelaboratorywhenMia’sfatherleftthelaboratorytoeatdinner
4000EssentialEnglishWords1–AnswerKey2Unit3Exercise11
cExercise21
bExercise31
ever/describe2
chart/aliens3
planet/universe4
solve/fail5
several/viewReadingComprehension1
HeviewedMarsonthetrip
Unit4Exercise1PartA1
spread2
content3
shake4
expected5
avoidedPartB1
bExercise21