9．People should avoid overnight in the open air in places where mosquitoes and take p——青夏教育精英家教网—

摘要：9．People should avoid overnight in the open air in places where mosquitoes and take protective measures. A. to stay ; collect B. staying; collect C. to stay; gather D. staying; gather

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People should avoid staying overnight in the open air in places ________ mosquitoes gather and take protective measures.

A．whose　　　　　　　 B．which

C．when 　　　　　 D．where

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