| A．when, that | B．that, which |
| C．when, which | D．that, when |
It was required that the tall building _______ at present because it is still new.
| A．not pulled down | B．was not pulled down |
| C．not being pulled down | D．not be pulled down |
This box is so heavy that he cannot lift it. ________, he is only a ten-year-old child.
| A．In all | B．Above all | C．At all | D．After all |
In this country, coalelectricity.
| A．is used to produce | B．is used to produced |
| C．is used to producing | D．used to produce |
Mike along with his mother _______ to blame for the mistakes they had made.
A. is B. was C. are D were
I shall never forget those years ____ I lived in the farm ___ you visited last week.
| A．when; where | B．which; which | C．when; which | D．which; where |