The World Expo_____in Shanghai now.A.being had B.is having C.is holding D.is being held 为什么选D

问题描述:

The World Expo_____in Shanghai now.A.being had B.is having C.is holding D.is being held 为什么选D

选D.
原因有两个
1,因为是被动语态,“世界博览会被召开”,所以需要用被动形式.
2,因为句尾有now,所以要用进行时,“世界博览会正在被召开”
所以结合起来要用“被动进行时”----is being held.
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