29. The moment we heard of the accident, we____the work to rescue those trapped in the mine.
| A．set off | B．set down | C．set back | D．set about |
.
Do you often shop in our store? How much do you ______ spend every time?
| A．approximately | B．properly | C．immediately | D．probably |
.
---Will you give up the plan?
---No. No matter what result is, I’ll still ______ to do it.
| A．manage | B．try | C．allow | D．encourage |
.
We will learn how to operate the machine _______.
| A．at a time | B．at one time | C．at the time | D．in time |
.
We need to strike a ______ between the needs of the country and the rights of the individual(个人).
| A．silence | B．difference | C．balance | D．weakness |
.
The thought ______ he would open a Sichuan restaurant in Los Angeles surprised his wife.
| A．that | B．what | C．whether | D．when |