[ Have to ]
Doctors ….. study at university
A. don’t have to
B. doesn’t have to
C. have to
D. don’t have to

Random Topics:
Compound and Complex, ConditionalsGerund & InfinitiveIndefinite PronounsFuture Tense VerbPronouns and AntecedentsPossessive Adjectives and Possessive PronounsRelative Clauses PronounsModals of ProhibitionPresent Tenses: Simple vs ContinuousPronounOther quiz:
Tenses and Structures › ViewHe _____ basketball very well.
A. Play
B. Plays
C. Playing
D. Played
Grammar › View
Don’t ______ the street. You should ______ that footbridge(天橋)over there.
A. cross; using
B. across; use
C. cross; to use
D. go across; use
Vocabulary › ViewWhat part of speech is the word ‘consume’?
A. noun
B. verb
C. adjective
D. adverb
Gerund and Infinitive › View
My parents don’t let me_______ out alone.
a. go
b. to go
c. going
d. to be going
