超过保质期限的食品在任何情况下严禁销售。( )
参考答案：对
The citizens of Beijing are proud of _______ they have done to make Beijing a beautiful city.
A．that
B．which
C．what
D．how
凡角质率在（）以上的为硬质小麦。
A.40
B.50％
C.60％
D.70％
