It was said was how the Chinese first raised silk worms.
| A．that what |
| B．that which |
| C．that who |
| D．that that |
It is bad manners to ________an invitation without a reason.
| A．break down | B．settle down | C．turn down | D．calm down |
The message of Saving Private Ryan is ________humans want peace, not war.
| A．that | B．what | C．which | D．whether |
- You talk so much about London. You ________have been there.
- Yeah, I went sightseeing on a tour last summer.
| A．must | B．can | C．will | D．need |
Don't press the red button ,_______you will set off the alarm.
| A．but | B．or | C．so | D．and |
- Will you be available at three o'clock tomorrow afternoon?
- No. I ______ a lecture then.
| A．are attending | B．will have attended | C．will attend | D．will be attending |