【題目】The environment in my hometown is improving because many trees __________ every year.

A.plantB.are plantedC.plantedD.were planted

【答案】B

【解析】

句意：我家鄉(xiāng)的環(huán)境正在改善，因為每年都種很多樹。

考查一般現(xiàn)在時的被動語態(tài)。plant種植，動詞原形；are planted一般現(xiàn)在時的被動語態(tài)；planted過去式或過去分詞；were planted一般過去時的被動語態(tài)。題干句是一個主從復合句，because引導的是原因狀語從句，從句的主語是manytrees，與謂語動詞plant之間是被動關系，所以應用被動語態(tài)；再由everyyear可知句子時態(tài)是一般現(xiàn)在時，所以空格上應該填一般現(xiàn)在時的被動語態(tài)，其結構為：am/is/are+及物動詞的過去分詞，只有B選項符合要求，故答案選B。

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