25、------What do you think of Harry, our new roommate?

------ I am not sure, but he is always asking ______ questions．

A．a great many of                                  B．a great many         

C．a great number                                   D．a large amount of

24、______ what he has had already, the treasure is not really exciting．

A．Compare with       B．Comparing to         C．Compared with     D．Compare to

22、--- Excuse me, can you tell me where the nearest bank is, please?

---______ Oh yes! It's past the office, next to a big market.

A．Mm, let me think.                         B．Oh, I beg your pardon?

C．You're welcome.                          D．What do you mean?

21、--- I wonder if I could possibly use your car for tonight?

---______. I'm not using it anyhow.

A．Sure, go head        B．I don't know          C．Yes, indeed           D．I don't care

20、It was not immediately obvious _____ water was to be fundamental to the development of life.

A．what                    B．that                      C．when                   D．why

19、_____ is even more important is that as the earth cooled down, water began to appear on its surface.

A．As                 B．That                   C．What                   D．Where

18、They multiplied and filled the oceans and seas with oxygen, _____ encouraged the later development of early shellfish and all sorts of fish.

A．that                      B．where                   C．when                   D．which

17、Walking does need a bit of practice _____ gravity has changed.

A．as if              B．in their turn            C．now that             D．as a result of

16、We watched, amazed as fire _____ on the outside of the spaceship as the earth’s gravity increased.

A．broke up               B．broke out              C．broke in                D．broke away