There are lots of problems in your hometown, but we're happy to see many of the

题干

There are lots of problems in your hometown, but we're happy to see many of them________.

A．are solving

B．are solved

C．have solved

D．are being solved

上一题下一题 0.65难度单项选择更新时间:2013-06-26 08:04:37

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