–Sorry, Professor Smith. I didn’t finish the assignment yesterday. --Oh, you _____ have done it as yesterday was the deadline. A. must B, mustn’t C, should D. shouldn’t
. Mary_____ to college last year. Unluckily, she couldn’t take the examination because of a sudden disease.
A must have gone B can have gone C should have goneD could have gone
. Look! There is a whole crowd of people over there. Go and see what_____ and if it is a bargain, buy it.
A is sellingB is being soldC has been selling D has been sold
With a series of strange phenomena_____ , people living in the small village began to suspect that the earthquake was coming.
A to happenB happeningC happened D being happened