The overseas Chinese scientist made another wonderful discovery, ___________ of great value to study AIDS.
| A．which I think it is | B．which I think is | C．I think it is | D．I think is |
Nelson Mandela’s death may, in the short term, unite South Africa in ways _______have never been seen before.
| A．by which | B．that | C．in which | D．who |
TV series Where Are We Going, Dad have made an _______ on kids since it was broadcast on Hunan TV.
| A．explanation | B．investigation | C．operation | D．impression |
________ warm at night, I would fill the woodstove, then set my alarm clock for midnight so I could refill it.
| A．Staying | B．Stayed | C．To stay | D．Stay |
一What do you think of the news related to you on the Internet，Mr Woods?
一_______.
| A．No comment | B．Thank you | C．With pleasure | D．All right |
—Do you know Henry didn’t win that speech contest?
—______? I thought for sure he would. He worked so hard on it.
| A．Do I | B．Don’t I | C．Did he | D．Didn’t he |