My father was mending his car while my mother .
| A．cooked | B．cooks | C．was cooking | D．cook |
We must have the machine ____.
| A．to repair | B．repairing | C．repair | D．repaired |
He didn’t enjoy the play because he ____.
| A．was boring | B．bored | C．was bored | D．boring |
The dog ____ mad（疯的）.
| A．looks | B．is looked | C．is being looked | D．was looked |
I think _____necessary（必要的） to learn English well.
| A．its | B．it | C．that | D．that is |
____ were all very tired, but none of ____ would stop to take a rest.
| A．We, us | B．Us, we | C．We, our | D．We, we |