[ Modal Verbs ]
You….ask your teacher if you don`t understand.
A. must
B. mustn`t

Random Topics:
Present Perfect and Present Perfect ContinuousPerfect TensePronouns and Subject Verb AgreementNouns as AdjectivesPast Simple and Past ContinuousGrammar - must & have toGrammar and PunctuationInfinitive FormsActive vs. Passive VoiceGrammar - FutureOther quiz:
Grammar › ViewCheetahs are ________ than horses.
A. more fast
B. faster
C. more faster
D. the fastest
Idiom and Tenses › View
“She’s over the moon about her new job.” What does “over the moon” mean?
A. Very Happy
B. Very Sad
C. Very Angry
D. Very Well