[ 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:
Grammar › View______ you having a party?
A. Where
B. We’re
C. Were
D. Wear
Grammar › View
That’s Peter, the boy ____________ has just arrived at the airport.
A. who
B. which
C. whose
