31．A study shows that students living in non—smoking dorms are less likely to——the habit of smoking．
| A．make up | B．pick up | C．draw up | D．turn up |
--- 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 |
Was it because it rained heavily last night _____ you didn’t come?
| A．that | B．why | C．so | D．what |