问题描述:
I often hear her( )in the next room.a/sing b/is singing c/to sing为什么选A
a的话不用加s吗,b错在哪.还有一题.she is ( )a red coat.a/in b/wearing 选A错在哪,
a的话不用加s吗,b错在哪.还有一题.she is ( )a red coat.a/in b/wearing 选A错在哪,
问题解答:
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