How do you spell______. [ ]
A. they
B. them
C. Its
D. their
答案：B
He met problems ______ he was going over his lessons. [ ]
A.before
B.as soon as
C.since
D.while
解决劳动纠纷的合同内方法（）
A、推脱责任
B、私自修改合约内容
C、执行订金罚则
D、按合同赔偿损失
