It will take a long time for the effective use of natural resources _________.
| A．to be made | B．to make | C．being made | D．making |
The parents seemed satisfied with the news __________ their son had been employed by a large company.
| A．what | B．which | C．that | D．when |
We have overlooked the fact __________ the children’s emotional development may be easily damaged.
| A．which | B．that | C．what | D．不填 |
In Mark’s speech, he made the point __________ far more people died from smoking than from taking drugs.
| A．where | B．what | C．which | D．that |
It is already well understood___________ causes the global warming.
| A．what | B．when | C．how | D．that |
___________we’ll go camping tomorrow depends on the weather.
| A．If | B．Whether | C．Where | D．That |