单项选择题

______ for you help, we' d never have been able to get over the difficulties.

A．Had it not been
B．If it were not
C．Had it not
D．If we had not been

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单项选择题

I've never been to Lansa, but that's the city______.

A．I' d most like to visit
B．that I like to visit mostly
C．where I like to visit
D．I' d like much to visit

单项选择题

Poverty is not______ in most cities although, perhaps because of the crowded conditions in certain areas, it is more visible there.

A．rare
B．temporary
C．prevalent
D．segmental

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