【題目】The conference was held to discuss the effect that tourism has ______ the wildlife in the area.

A.in B. on

C.at D. with

【答案】B

【解析】考查介詞。句意:舉行會議來討論旅游業(yè)對這個地區(qū)野生動植物的影響。使用短語have effect on sth對……有影響。故選B。

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