We would make a big snowman now if it heavily last night.
| A．snowed | B．has snowed |
| C．would snow | D．had snowed |
We should think hard ________ human activity has caused greenhouse effect.
| A．it is how that | B．how it is that |
| C．that how is it | D．how is it that |
The date for the next round six-party talk ________ but whether progress will be made remains ___________.
| A．has agreed; to be seen |
| B．has been decided on; to be seen |
| C．has been reached; being seen |
| D．has been determined on; being seen |
If I can help_______, I don't like working late into the night.
| A．so | B．that | C．them | D．it |
—Does the idea of working abroad________you?
—Yes. But I have no chance.
| A．lead to | B．adapt to |
| C．appeal to | D．contribute to |
China made its firm ____ to cut carbon emissions in 2009.
| A．commitment | B．project |
| C．competition | D．comprehension |