It is helpful to put children in a situation _____ they can see themselves differently.
| A．that | B．when | C．which | D．where |
A new teachnique ____the yields as a whole increased by about 30 percent.
| A．had applied | B．having applied | C．to have applied | D．having been applied |
No matter how frequently _____ ，the works of Shakespeare always attract large audiences．
| A．performing | B．to be performed | C．performed | D．being performed |
The place _______ the bridge is supposed to be built should be _______ the cross-river traffic is the heaviest.
| A．which; where | B．at which; which | C．at which; where | D．which;in which |
How do you think I should receive the reporter?
— _______ you feel about him, try to be polite.
| A．How | B．What | C．Whatever | D．However |
All the students __ a loud laugh when the teacher told them the joke.
| A．let off | B．let down | C．let out | D．let up |