7．　 C　　 let alone。为固定短语“更不用说”、“不必考虑”。

6．　 B　　 but转折连词，表“但是”。

5．　 A　 matter = is important要紧，重要。

4．　 B no worse than = as good as与……一样好。请比较：no better than = as bad as与……一样差；not better than不比……好。

3．　 C 副词though常用于句末，意为“但是、然而”。另外，(and)yet也可表示“但是”，但要置于从句的前面。用indeed(的确)和anyway(无论如何)，意思不通。

2．　 C 此处one = a job，指既能用到你的技术又是你感兴趣的“一类工作”。千万不要以为后面有定语从句修饰就是特指的，而误选D。

1．　 B 指自然环境或生态环境时，environment前面要加the；作“自然、自然界”解的nature是不可数名词，前面通常不用冠词。

15.　 -We’d better hurry; or we’ll be late.

一 ________? Do you really want to listen to the boring lecture?

A. For what　　 B. Take it easy　　　 C. What on　　 D. So what

答案与详解

A组

14.　 -Was it two months ago ________ you luckily got an opportunity to spend your holiday in Canada.

-________. John was the lucky dog.

A. when, Not I　　　 B. when, Not really　C. that, Not at all D. that, Not me

13.　 -The thread of my kite broke and it flew away.

-I told you it would easily break ________ it was the weakest.

A. when　 B. for　　　 C. since　 D. where