杭州交通信息网通州钣金加工:一个非常困难的问题,高手请进,垃圾不要看
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There great pop ______(sing)______ (sing)in the hall now.
singers,are singing
前面应该是these吧？
There great pop song is being sung in the hall now
singer is singing/singers are singing
songs;are being sung
我同意
楼上的看法.
挺简单的啊，singer,sings\singer,is singing\singers are singing