.
I’ve never read a better book than this one．_____，it is the best one that I have ever read．
| A．Since then | B．In other words | C．At times | D．In some ways |
Scientists have to work hard to keep ________ with modern discoveries and developments..
| A．company | B．track | C．touch | D．pace |
Doctors are doing research to find out what happens physically when people ______ smoking.
| A．quit | B．decline | C．depart | D．reserve |
If you are feeling so tired , perhaps a little sleep would ______.
| A．act | B．help | C．serve | D．last |
—May I have a word with you?
—________.I’m not busy, anyway.
| A．By no means | B．By all means | C．By means of | D．By any means |
The experts suggested the problem worth paying attention ____ at the meeting.
| A．to be discussed | B．to been discussed | C．being discussed | D．should be discussed |