Scientists still wonder ______ cloning will help or harm us and _____ it is leading us.
| A．that; what | B．whether; where |
| C．if; that | D．whether; how |
—He should have come to join in the thorough cleaning.
—He ________, I think. It's not his turn.
| A．needn't have to | B．needn't have | C．didn't have to | D．doesn't need to |
She surprised her neighbors ______ one of her favourite home-made dishes.
| A．over | B．at | C．in | D．with |
Many people hope the new government will ______ the unemployment rate.
| A．reduce | B．minus | C．shorten | D．solve |
The fact is that the company is unlikely ______ the situation.
| A．to change | B．to be changed | C．changing | D．changed |
I argued with my parents until they finally ______ and let me drive every day.
| A．gave off | B．gave out | C．gave in | D．gave over |