在使用水泥时发现其初凝时间达不到要求，则该水泥()。
A.可少量掺用
B.降级使用
C.报废
D.判定为不合格
参考答案：C
—Have you finished the book？
—No. I’ve read up to _____ the children discover the secret cave.
A．which
B．what
C．that
D．where
Either you or he ______ the team.
A. is in B. are onC. is on D. are in
