— People should spare no efforts to protect the environment.
— ________. Air pollution does harm to our health.
| A．All right | B．Take it easy | C．Go ahead | D．Exactly |
—John，when will you pay a visit to that place of interest?
—I can’t decide at present. _______.
| A．It just depends | B．It’s up to you | C．Take your time | D．I beg your pardon |
Gun control is a subject _______ Americans have argued for a long time.
| A．of which | B．with which | C．about which | D．into which |
At present, we are studying a total of nine subjects, ________ I think is physics.
| A．of them the most difficult | B．and the most difficult of which |
| C．the most difficult of them | D．the most difficult of which |
Some teenagers turn a deaf ear to their parents’ advice, ________ they know it does good to them.
| A．now that | B．as if | C．even if | D．so that |
You can’t imagine what _______ his speech on how to improve our spoken English had on me at that time.
| A．impression | B．advice | C．attention | D．effect |