Passers-by rescued a motorcycle driver ______ under a burning car．
| A．was trapped | B．trapping |
| C．having trapped | D．trapped |
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 |
_________he said at the meeting astonished everybody.
| A．It | B．That | C．What | D．The fact |
Obviously they didn’t see the significance of the plan. That’s __________the problem was.
| A．why | B．where | C．that | D．how |