单项选择题

Why have there been difficulties with the machinery for the new product（）

A. It has been necessary to meet regulations.
B. It is difficult to find suitable equipment.
C. It keeps breaking down.

<上一题 目录 下一题>
热门 试题

单项选择题
Why is the woman in Toronto（）

A. to visit friends
B. to travel
C. to work
填空题
17（）
相关试题