单项选择题

The manager of the company insisted that all the staff members ______ the new safety rules.

A．would observe
B．observe
C．observed
D．will observe
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单项选择题
The word deficit (Line 4, Para. 1) would be best replaced by which of the following
A．shortage
B．situation
C．increase
D．products
单项选择题
Which of the following is not mentioned as a possible cause of a trade imbalance
A．Low labor and material costs in Asian countries.
B．A lack of natural resources.
C．An underdeveloped industrial base.
D．The high cost of exported items.
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