单项选择题

The last half of the nineteenth century ______the steady improvement in the means of travel.（）

A.has witnessed
B.was witnessed
C.witnessed
D.is witnessed

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单项选择题
The government ______ regulations that put this old city under protection.（）

A.published
B.issued
C.discharged
D.released
单项选择题
_____that Susan hadn’t dared to make a sound.（）

A.So was he absorbed
B.So absorbed he was
C.So absorbed was he
D.So he was absorbed
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