The discovery of these tombs is ______ for scholars' studying Chinese history.
| A．of very important |
| B．great significant |
| C．of great significance |
| D．greatly importance |
.There are over 58,000 rocky objects in__________ space,about 900 of which could fall down onto earth.
| A．the rhe | B．不填 the | C．the不填 | D．a the |
We______________last night，but we went to the concert instead.
| A．have studied | B．might study |
| C．should have studied | D．would study |
Computers and mobile phones, playgh they are indeed making our life________and more________have reduced the need for face-to-face cotyr unication.（）
| A． | easily;effienenl | B． | easier;efficient | C． | easy;efficiently | D． | easily;efficiently |
Mother wanted to be a good provider, a role shesince her marriage to Father.
| A． | shoulders | B． | shouldered | C． | is shouldering | D． | has been shouldering |
Parentsmuch importance to education. They will do their best to give their children that priceless gift.
| A． | attach | B． | pay | C． | link | D． | apply |