_____ you have worked out the first problem, you may go on to work on the second

题干

_____ you have worked out the first problem, you may go on to work on the second.

A．Even if

B．Unless

C．Now that

D．Though

上一题下一题 0.64难度单项选择更新时间:2013-05-22 08:07:33

小学学科试题库

初中学科试题库

高中学科试题库