13. In any case, parents should make clear _______, if any thing, the children are expected to pay for with the money.
| A．that | B．which | C．what | D．How |
________means that you have a positive attitude toward your abilities and life.
| A．Be confident | B．Being outgoing |
| C．To be outgoing | D．Being confident |
She paused________over the unfamiliar word but soon continued.
| A．frequently | B．briefly |
| C．anxiously | D．casually |
It is reported that a similar technique can be________to the treatment of cancer.
| A．applied | B．attached |
| C．added | D．compared |
—Tom often plays the record very loud at midnight in his apartment.
—________！
| A．Just your luck | B．Better not |
| C．It can’t be helped | D．That’s too much |
The children________very well last night and the audience were attracted by their play.
| A．permitted | B．performed |
| C．pretended | D．presented |