They must have been enjoying themselves there, otherwise they _______ so long.
| A．can’t have stayed | B．wouldn’t have stayed |
| C．needn’t have stayed | D．couldn’t stay |
— What should I wear to attend his wedding party?
— Dress _______ you like.
| A．what | B．however | C．whatever | D．how |
_____ different life today is from _______ it was thirty years ago.
| A．What; what | B．What a ; what | C．What a; how | D．How; what |
．To his great excitement, the day he looked forward to _______ at last!
| A．had come | B．coming | C．came | D．to come |
Jack said that he was sure of succeeding in passing the Totel Examination this time, _______, in my opinion, I don’t think so.
| A．what | B．which | C．but | D．therefore |
We must take measures to protect endangered wildlife _______ it is too late.
| A．now that | B．as long as | C．unless | D．before |