Why is it that several students in a class will fall out of their chairs laughing after I tell a joke while the rest of the students look as if I’ve just read the weather report

问答题The problem is not easily solved because it is in the nature of science to question, and it is in the nature of human beings not to want to question the things they believe in.

单项选择题We learn from Paragraph 1 that ().

A. the government is usually the first to name a place
B. many places tend to have more than one name
C. a ceremony will be held when a place is named
D. people prefer the place names given by the government

单项选择题Small talk , as interpreted by the author, ().

A. has no real function in communication at all
B. is usually meaningless and therefore useless
C. is not as idle as it may seem to be
D. is restricted to certain topics only

单项选择题Darwin was very interested in ().

A. attending medical classes
B. the work of a minister
C. sailing around the world
D. science

单项选择题What is the main idea of this passage().

A. Advertisement.
B. The benefits of advertisement.
C. Advertisers perform a useful service to communities.
D. The costs of advertisement.

单项选择题21().

A. an adventure
B. a story
C. an experience
D. a creation

单项选择题You () all those calculations! We have a computer to do that sort of thing.

A. needn’t have done
B. must not have done
C. shouldn’t have done
D. can not have done

单项选择题At last the girl received the letter she () for so long a time.

A. has been expecting
B. had been expecting
C. was expecting
D. had expected

单项选择题You thought they could have completed the project, ().

A. haven’t you
B. won’t you
C. doesn’t you
D. didn’t you

单项选择题She told her children that they must not () play with matches.

A. by no means
B. in no sense
C. on any account
D. to good account