对小儿的预防蛲虫病的措施不恰当的是（）
A.饭前便后洗手
B.不吸吮手指
C.不穿开裆裤
D.预防性用药
E.勤剪指甲
参考答案：D
In recent years, great changes have taken place in the city of Wenzhou. As we can see, many streets and roads_______.
A．had been built and rebuilt
B．has been built and rebuilt
C．have been built and rebuilt
D．are being built and rebuilt
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