you must do all of your homework?

[MustyS]

English Language Tests, Intermediate level

ESL/EFL Test #783 "Grammar Tutorial: Correct Word Usage (1)", question 1

You ......... do all of your homework or you won't receive full credit for this course.

(a) must
(b) must be
(c) which must
(d) must have

English Language Tests, Intermediate level

ESL/EFL Test #783 "Grammar Tutorial: Correct Word Usage (1)", answer 1

You must do all of your homework or you won't receive full credit for this course.

Correct answer: (a) must
_________________________

why letter a

[Mister Micawber]

The missing verb is the finite verb of the first clause, and it is followed by the bare infinitive 'do'. Only A fits that grammar.
_________________
Native English teacher at Mister Micawber's