40 dead

　　错：Her mother has died for ten years.

　　对：Her mother has been dead for ten years. / Her mother died ten years ago.

　　她的母亲去世十年了。

　　(die是短暂性动词，不能与段时间连用。)

　　41 despite

　　错：Despite the train was empty, he came and SAT in front of me.

　　对：Despite the train being empty, he came and SAT in front of me.

　　尽管火车车厢很空，他却过来坐在我前面。

　　(despite是介词，不能接从句。)

　　42 difficult

　　错：I was very difficult to make a fire in the open because of the wind.

　　对：It was very difficult for me to make a fire in the open because of the wind.

　　风太大，我很难在户外把火生起来。

　　43 discount

　　错：He bought the house at a 90% discount.

　　对：He bought the house at a 10% discount.

　　他以九折的价钱买了这房子。

　　44 discuss

　　错：We spent two hours discussing about the course.

　　对：We spent two hours discussing the course.

　　我们花了两小时讨论这个课程。

　　(discuss为及物动词，后不用介词，直接接宾语。)

　　45 dozen

　　错：I bought two dozens of apples.

　　对：I bought two dozen of apples.

　　我买了24个苹果。

　　(dozen被具体数字修饰时用单数;dozens of指“许多”。)

　　46 each

　　错：They each has a beautiful daughter.

　　对：They each have a beautiful daughter.

　　他们每个人都有个漂亮的女儿。

　　47 efficient

　　错：The medicine proved very efficient.

　　对：The medicine proved very effective.

　　这药证明非常有效。

　　(efficient 效率高的;effective有效的)

　　48 elder

　　错：The two ladies are twins. Can you tell which is the older?

　　对：The two ladies are twins. Can you tell which is the elder?

　　这两位女士是孪生姐妹。你能分清哪位是年长者吗?

　　(older是比较级形容词，不能用作名词;elder这里是名词，指家庭里的年长者。)

　　49 elect

　　错：They elected Smith as the mayor.

　　对：They elected Smith as mayor.

　　他们选史密斯当市长。

　　(选举某人任某职务用“elect sb (as) sth”。)

　　50 else

　　错：His work is better than anyone’s else.

　　对：His work is better than anyone else’s.

　　他的工作比别的任何人的都要好。

       更多高考内容请关注:长沙新东方官网