Science has given clear evidence ______ smoking can lead to many diseases.
| A．what | B．which | C．that | D．where |
How I wish I _________ him the secret! I regret having done that now.
| A．hadn’t told | B．had told | C．would tell | D．didn’t tell |
—Who do you think will get the first prize? —Mary, of course. She ________ for the competition for months.
| A．is preparing | B．was preparing |
C．has been preparing | D．had been preparing |
All his time _______research on Chinese history, he has no time for outdoor activities.
| A．devoted to do | B．devoted to doing |
C．devoting to doing | D．is devoted to doing |
—How long do you think it will be _______ we get the loan?—Perhaps two or three months.
| A．until | B．before | C．when | D．that |
Hardly had she heard the sad news that her son lost her job when she_____crying.
| A．burst into | B．set out | C．burst out | D．set about |