---Has George returned from Japan yet? I’d like to meet him.
---I’m terribly sorry, but he _______ back here only for last weekend.
| A．has been | B．would be | C．had been | D．was |
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 |
_________he said at the meeting astonished everybody.
| A．It | B．That | C．What | D．The fact |