来吧；Never mind没关系，故选C。

9．Having a trip abroad is certainly good for the old couple，but it remains________ whether they will enjoy it.

A．to see B．to be seen

C．seeing D．seen

答案　B

解析　句意为：到国外旅行对这对老夫妇来说当然有好处，但他们是否喜欢还要拭目以待。此处remain为连系动词，it为形式主语，且see与it(即having a trip abroad)之间存在被动关系。所以选B。

10．When you are old enough to________ things，you should decide your path in life.

A．judge B．choose

C．study D．research

答案　A

解析　句意为：当你年龄大到足以判断事情时，你应该决定自己的人生道路。judge判断，符合句意。

11．The flu is believed________ by viruses that like to reproduce in the cells inside the human nose and throat.

A．causing B．being caused

C．to be caused D．to have caused

答案　C

解析　考查sb./sth. be believed to do sth.句型。flu与cause之间是被动关系，所以选C。

12．Local citizens placed flowers at the corner of one street in Hamilton，Canada，________the Canadian soldier，who was killed by a gunman.

A．in favor of B．in memory of

C．in terms of D．in spite of

答案　B

解析　句意为：当地居民在加拿大哈密尔顿的一条街道的拐角处摆放了鲜花，来纪念那位被持枪歹徒杀死的加拿大士兵。In favor of赞成，支持；in terms of就......而言；in spite of尽管。In memory of为了纪念，符合语境，故选B项。

13．The wire was found broken. And________，there happened to be no one getting near.

A．therefore B．however

C．otherwise D．fortunately

答案　D

解析　句意为：电线断了。幸运的是，恰巧附近没人。根据句意选D。