If we ___________some measures, we might have prevented the environmental pollution．
| A．take | B．had taken | C．took | D．have taken |
相关试题
Don’t turn round. Go ______ this street till you see the school.
| A．down | B．to | C．straightly | D．straight |
You can go to 
the newspaper library and _____ any information you need for your new story.
| A．look for | B．look up | C．look at | D．look into |
Many policemen and soldiers are ______ the forest _____ the prisoner escaping from prison.
| A．searching for; searching | B．searching; searching |
| C．searching; in search of | D．in search for; searching for |
When _____, the man said he went home at 2:00 a.m., _____ and only _____ his house broken into.
| A．asked; tired; to find | B．asking; tired; finding |
| C．asked; tiredly; to find | D．asking; tired; finding |
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