________the problem, he wouldn't have committed those mistakes.
| A．If he understood | B．Had he understood | C．When he had understood | D．If he would understood |
_____entering the classroom, remember to take your seat and turn off your cell phone.
| A．At | B．From | C．Upon | D．As |
(2014届浙江省宁波市十校高三3月联考英语试卷）
In such a background, his white hair was particularly his dark skin．
| A．in relation to | B．in need of | C．in contrast to | D．in favor of |
______ difficulty, you can reach me at this number. I’m always at your service.
| A．In favor of | B．In terms of | C．In case of | D．In spite of |
These days, it seems that we rely on the Internet often, and we couldn’t possibly live _____it.
| A．on | B．without | C．with | D．in |
(2014届陕西省五校联盟高三第二次模拟考试英语试卷）
You can change your job, you can move your house, but friendship is meant life.
| A．of | B．on | C．to | D．for |