. --- My son is addicted to drugs. He isn’t hopeless, is he?
--- Yes, ______ he mends his way and starts all over.
| A. if |
B. when |
C. even if |
D. unless |
99.The chairman thought___________necessary to invite Professor Smith to speak at the meeting .
| A．that | B．it | C．this | D．Him |
98.—There is still a copy of the book in the library. Wall you go and borrow ________?
—No, I’d rather buy ________ in the bookstore. 
| A．it;one | B．one;one | C．one;it | D．it;it |
97.The information on the Internet gets around much more rapidly than ____ in the newspaper.
| A．it | B．those | C．one | D．That |
96.To save class time, our teacher has ________ students do half of the exercise in class and complete the other half for homework. .
| A．us | B．we | C．our | D．ours |
95._________ worries me the way he keeps changing his mind.
| A．This | B．That | C．What | D．It |