A lot of research and studies have shown that Trench oil, taken out from kitchen waste, ______ the increase of cancers.
| A．results from | B．attends to | C．contributes to | D．devotes to |
He called to tell me that you are in hospital, otherwise I ______ nothing about it.
| A．had known | B．wouldn’t have known |
| C．would know | D．would have known |
Living in the mountain area has its problems , _____ obtaining water is a big problem.
| A．of which | B．for what | C．as | D．whose |
_______by beautiful green mountains and located at the foot of Lushan Mountain makes it a famous tourist attraction.
| A．Surrounded | B．Being surrounded |
| C．Having been surrounded | D．surrounding |
I’m writing to apologize for my absence from last week’s meeting. I was unexpectedly ________ at work.
| A．picked up | B．given up | C．held up | D．made up |
Work hard and try to make what the teachers teach ________in class.
| A．you | B．yours | C．us | D．ours |