单项选择题

So far the construction of the two new bridges over the river （）.

A．have been completed
B．has been completed
C．has completed
D．have completed

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单项选择题

It is clear that in modern society high （） and demands are placed on teachers.

A．motivations
B．expectations
C．standards
D．opportunities

单项选择题

One of （）most common illnesses in our society is time sickness , （）sense of time pressure and hurry that causes anxiety and tension.

A．/； a
B．/；th
C．the； a
D．the； the

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