20. _________raining hard for 3 hours without stopping.
21.
| A．It is | B．It was | C．It has been | D．It had been |
Professor Li always allows his students to voice their opinions in class, ______ sometimes their opinions are not sound.
| A．so that | B．in case | C．even if | D．as though |
--Shall I have another look at the flat and tell you more about it?
--__________. I’ll telephone the salesgirl for details myself later.
| A．Go ahead | B．Good chance | C．Don’t bother | D．It depends |
--- We have just watched a wonderful movie! Iron man is really excellent!
--- ___________. I have never watched a better film than this one.
| A．You’ re dead right | B．Personally, I disagree with you |
| C．I’m not sure about you | D．I can’t stand it |
Running a company is not ______ a matter of hiring people---they also need to be trained.
| A．partly | B．simply | C．obviously | D．equally |
Leaders should be careful not to act beyond their _______ and do things against the law.
| A．power | B．violence | C．competition | D．solution |