—I have trouble _____ my new computer. —Don’t worry. I’ll show you how ____it.
| A．using, using | B．to use, to use |
| C．using, to use | D．to use, using |
The old man is well because he often_______.
| A．exercises | B．drinks | C．sleeps | D．play |
They watch TV________.
| A．one a week | B．once a week |
| C．one the week | D．once week |
________ he is ill, ________he goes to school.
| A．Although; but | B．/; / |
| C．Although; / | D．But; although |
— ________ are they staying?—Two days.
| A．How many | B．How often |
| C．How long | D．When |
He went into his room and ______to work.
| A．begins | B．began | C．beginning | D．to begin |