[ Grammar ]
Which of the following sentences is CORRECT?
A. Marcia must have been very busy last weekend.
B. Marcia must had been very busy last weekend.
C. Marcia must has been very busy last weekend.
D. Marcia must be very busy last week.

Random Topics:
Grammar - FragmentsPresent Simple and Present Continuous-ed or -ingUse of Prepositions or ConjunctionsSentence and FragmentWish / If only ( Present)Mixed GrammarPast Perfect SimpleOffer and SuggestionModals of ObligationOther quiz:
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A. Does he?
B. Doesn’t he?
C. Has he?
D. Hasn’t he?
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“This issue is between John and _________,” Lily said. “Please let us sort it out by ourselves.”
A. I
B. he
C. she
D. me
Grammar › View______ you having a party?
A. Where
B. We’re
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That’s Peter, the boy ____________ has just arrived at the airport.
A. who
B. which
C. whose
