() 3. —We should make a contribution to the environment.

        --I agree with you. More and more trees need.

   A. protecting;to plant        B. protect;plant

   C. protecting;to be planted   D. protect;planted

3.C

3.C 

(make a contribution to doing sth.指“為做貢獻(xiàn)”，more and more trees作主語，故應(yīng)該用被動語態(tài)，故選   C. )

題目來源：2016年啟東中學(xué)作業(yè)本九年級英語下冊譯林版 > 作業(yè)14 單元知識復(fù)習(xí)

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