There is no reason ________ he should refuse to join us.
A. why
B. because
C. that
D. so that
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Some of these methods will work, but ________ will not.
A. other
B. the other
C. another
D. others
当今中国社会非常缺少蓝领工人。(shortage)
本市蓝领工人的月平均工资在3,000元左右。(average)
杰克是一位富有经验的机械工,当机器出故障时能保持冷静。(break down)