Please reply to our inquiry () your earliest convenience.
A. by
B. upon
C. for
D. at
参考答案:D
()机房应通风良好,门窗应防风雨,门应有锁,并标有“机房重地,闲人免进”字样。
初次发生性关系时,超过()的女性不会落红。
A.10%
B.30%
C.40%
D.50%