笔算201×39，运用乘法分配律比较简便。[ ]
正确
The media can often help solve problems and draw attention _____situations ________help is needed.
A．in; that
B．to; which
C．in; where
D．to; where
人员短期证件有效期限不超过（）个月。
A.二
B.三
C.五
D.六
