—How lovely these children are!
—Yeah．They______ memories of my childhood．
| A．called out | B．called for | C．called up | D．called on |
The civil war broke out in Libya, ______ to the instability of the international oil price．
| A．to contribute | B．contributed |
| C．having contributed | D．contributing |
Recently a new social issue has been brought to everyone’s attention _____food additives are abused．
| A．when | B．whether | C．that | D．which |
While the police have already done a lot of investigation, much evidence _____.
| A．is remaining to be confirmed | B．remained to be confirmed |
| C．is remained to be confirmed | D．remains to be confirmed |
_____ on everyday practice, progress in English is a goal which can be achieved．
| A．Based | B．Basing | C．Having based | D．Being based |
Look out! Keep away from the house, _____ the roof is under repair．
| A．whose | B．which | C．of which | D．where |