题目列表(包括答案和解析)
Fight in films has a bad effect ____ people, especially the teenagers.
A. in B. to C. with D. on
Trees ____ fight air pollution．They are natural air conditioners．
A．should B．must C．need D．can
Trees ____ fight air pollution．They are natural air conditioners．
A．should B．must C．need D．can
Trees ____ fight air pollution．They are natural air conditioners．
A．should B．must C．need D．can
| A．should | B．must | C．need | D．can |
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