当出现范围较大的管涌群时，可修做月堤（围埝），形成圈围管涌的（）。
A.铺盖
B.养水盆
C.后戗
D.压渗台
参考答案：B
There are rivers in the village.[ ]
A. no
B. isn't
C. aren't
—We hope you a nice birthday. —Thank you. [ ]
A. have
B. to have
C. having
D. has
