Don’t treat the vase as if it _______ made of steel.
| A．is | B．was | C．were | D．had been |
Robert is said ___________ abroad, but I don’t know what country he
studied in.
| A．to have studied | B．to be studying | C． to study | D．to have been studying |
--- When did you go to Shanghai?
--- I remember ______ there when I was a boy of ten.
| A．to be taken | B．being taken | C．to take | D．having taken |
The experiment turned out to be a complete failure, _______ wasn’t ______ they wanted.
| A．it; what | B．as; that | C．which; what | D．that; what |
--- You’ve agreed to go. So why aren’t you getting ready right now?
--- But I _______ that you would like me to start at once.
| A． don’t realize | B．haven’t realized | C．didn’t realize | D．hadn’t realized |
--- You didn’t hear me until now?
--- No. I must ___________ soundly(沉) when you came in.
| A．have slept | B．be sleeping | C．sleep | D．have been sleeping |