A lot of people ______ the theory that acupuncture can produce chemicals in the body which reduce pain.
| A．correspond to | B．relate to |
| C．subscribe to | D．refer to |
The glass doors have taken the place of the wooden ones at the entrance, ______ in the natural light during the day.
| A．to let | B．letting | C．let | D．having let |
Those successful deaf dancers think that dancing is an activity ______ sight matters more than hearing.
| A．when | B．whose | C．which | D．where |
If you ______ at school, you ______ a college student now.
| A．had studied hard; would have been |
| B．should have studied hard; should have been |
| C．had studied hard; would be |
| D．would study hard; must have been |
--- Sorry, do you mind if I smoke here?
--- Yes, ______.
| A．you could | B．go ahead |
| C．I do | D．my pleasure |
Although she had been ill for a long time, it still came as a shock when she ______ died.
| A．eventually | B．willingly |
| C．unexpectedly | D．disappointedly |