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 |
Have a care what you say ______ you may regeret.
A.or B. and C. however but
Only when he saw the test paper himself, ______ he had failed in the exam again.
| A．he believed | B．he had belived | C．did he believe | D．had he believe |
It is no good ______ the flowers to often, for a lillte water is enough for them.
| A．watering | B．to water | C．watered | D．waters |
_____ into English, the sentence was found to have an entirely different word order.
| A．Translating | B．To translate | C．Having translated | D．translated |
He was obliged to ______ the trade of shoemaker.
| A．take on | B．take in | C．take up | D．take down |