Don't trust such people ______ praise you to your face but speak ill of you behind your back.
| A．who | B．whoever | C．that | D．as |
It was ______ the second-hand bus that the mechanic spent the whole afternoon in the factory.
| A．in repair | B．repaired | C．repairing | D．to repair |
He doesn’t think the question of ______they are boys or girls is important .
| A．if | B．whether | C．which | D．that |
Great changes have taken place in that school. It is no longer _____it was 20 years ago, ______it was so poorly equipped.
| A． What ;when | B．that; which | C． what; which | D．which; that |
A forest is usually found _______ heavy rainfall is frequent.
| A．there | B．which | C．where | D．because |
—When can I use your computer?
—Never! _______ should you touch it.
| A．At no time | B．In no time | C．At any time | D．At one time |