填空题

There is someone on duty here at all times.

【参考答案】

A

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热门试题

单项选择题

According to the passage, why did so many family-run businesses fail（）

A．Because they are frequently facing financial problems.
B．Because the family members in these companies do not trust each other.
C．Because there are often communicative problems within family members.
D．Because they do not focus on family ties.

单项选择题

20（）

A．involved
B．connected
C．related
D．done