Had I known about this computer program, a huge amount of time and energy .
| A．would have been saved |
| B．had been saved |
| C．will be saved |
| D．was saved |
20.---------the English exam is difficult , isn’t it?
-------__Yes. Even Tom, ________to the top students, failed .
| A．belonging | B．belonged | C．to belong | D．Belongs |
19. James Williams is my favorite professor; his speech is always brief, clear andthe point.
| A．to | B．on | C．at | D．Of |
18. – Students should devote most of their time to studying rather than playing computer games.
– ________. No pains, no gains.
| A．Really | B．Obviously | C．Actually | D．Exactly |
17．I ______ you my bicycle, but I didn't expect you would come back so soon·
| A．might lend | B．may lend | C．must have lent | D．might have lent |
16 My English teacher is really very kind. I’ll never forget the ______ he has done me.
| A．favor | B．deed | C．help | D．Value |