填空题

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

【参考答案】

(should) observe
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填空题
There are many small things we can do to reduce the (pollute) ______ of the environment.
单项选择题
A．Customer and waiter.B．Wife and husband.C．Boss and clerk.D．Father and daughter.
A．Customer and waiter.
B．Wife and husband.
C．Boss and clerk.
D．Father and daughter.
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