—Do you often go fishing at weekends?
—Not often，I only go fishing________.
| A．at one time | B．all the time |
| C．at a time | D．from time to time |
It is known to all that ____ you exercise regularly, you won’t stay healthy.
| A．because | B．unless | C．now that | D．in case |
Published in 1974,the book was a(n) _____ success and was soon translated into thirteen foreign lanuages.
| A．constant | B．instant | C．confident | D．innocent |
The Medical Research Council said it could not _____ use of the new drug without further tests.
| A．assist | B．acquire | C．accuse | D．approve |
In an interview, don’t say anything negative about your employer---it gives a bad______.
| A．attitude | B．experience | C．decision | D．impression |
Under the new policy, anyone who is found ______ in the school building will be fined $60.
| A．smoke | B．smoking | C．to smoke | D．smoked |