护肩路基的高度一般不超过( )m。
A．3
B．2
C．1
D．0.8
参考答案：B
—Where is Jack?
—He _____the reading-room. [ ]
A. have been
B. has been to
C. has gone to
D. has been in
My suggestion is ______ we should have mercy ______ these homeless children and offer them some help.
A．that; on B．what; toC．which; for D．that; for
