Tom just finished ________ her homework.
| A．to do | B．does | C．to doing | D．doing |
The new iphone 5 costs so________that I don’t think a student can________ it.
| A．expensive; buy | B．high; offer | C．much; afford | D．dear; pay |
Mr Chen told us that three fourths of the earth ________covered with water.
| A．were | B．is | C．was | D．are |
Professor Zhang Cunhao and Professor Cheng Kaijia ________China's top science award by Mr President Xi Jinping on 10 January, 2014.
| A．presented for | B．honoured with | C．was honoured for | D．were presented with |
I think your suggestions are of great ________ to me and they are well worth ________.
| A．valuable; to offer | B．valuable; giving | C．value; taking | D．value; to follow |
The director wants to make sure no one will solve the mystery until it ________ at the end of the horror film.
| A．is explained | B．will be explained | C．explains | D．has explained |