6. A. think B. leave C. stand D. speak

5. A. class B. room C. office D. lab

4. A. notice B. message C. book D. question

3. A. asked B. decided C. forgot D. heard

2. A. clever B. hard C. slow D. quick

1. A. because B. so C. but D. though

10.C. 能到剑桥读书是很多人的愿望。

　(10)

　There was a woman in Detroit, who had two sons. She was worried about them, especially the younger one, Ben, (1)______he was not doing well in school. Boys in his class made jokes about him because he seemed so (2)______.

　The mother (3)______ that she would, herself, have to get her sons to do better in school. She told them to go to the Detroit Public Library to read a (4)_____ a week and so a report about it for her.

　One day, in Ben's (5)______, the teacher held up a rock and asked if anyone knew it. Ben put up has hand and the teacher let him (6)_____. “Why did Ben raise his hand?” they wondered. He (7)_______ said anything; what could he possibly want to say?

　Well, Ben not only (8)_______ the rock; he said a lot about it. He named other rocks in its group and even knew (9)______ the teacher had found it. The teacher and the students were (10)_______.Ben had learned all this from doing one of his book (11)____.

　Ben later went on to the (12)_____ of his class. When he finished high school, he went to Yale University and at last became one of the best doctors in the United States.

　After Ben had grown up, he (13)_____ something about his mother that he did not know as a (14)_______.

　She, herself, had never learned how to (15)_______.

9.A. 随着剑桥规模的进一步扩大，它逐渐成了一座城了。

8.C. 根据“after the opening of the railway in 1845” 可知，自从铁路开通之后，剑桥的发展一定更快了。

7.A. 河的上面有一座桥。