用水泥堵漏，水泥的凝固时间约为()小时。
A.36
B.24
C.12
D.6
参考答案：B
—Sorry, do you mind if I smoke here?
—Yes, _______.
A．you could
B．go ahead
C．I do
D．my pleasure
《明镜》周刊
—Yes, _______.