—Who broke the big vase in the back office?—It ___ ...

★ Modals with Perfect Infinitive

—Who broke the big vase in the back office?—It ___ Brian – he’s very clumsy.

A. should have been

B. can’t have been

C. may have been

D. need to be

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My wife made me go shopping with her last Saturday, but I ___ gone fishing instead.

A. would rather have

B. might have

C. must have

D. could have