问题
选择题
These days students in some schools ______ not to use mobile phones.
A．ask
B．asked
C．are asked
D．were asked
答案
C
被动语态。主语students是动作的承受者，所以用被动语态；根据these days可知用一般现在时。
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These days students in some schools ______ not to use mobile phones.
A．ask
B．asked
C．are asked
D．were asked
C
被动语态。主语students是动作的承受者，所以用被动语态；根据these days可知用一般现在时。