单项选择题

______, the new medicine is now in mass production.

A．With the solved problem
B．With this problem being solved
C．With the problem solved
D．With this problem to solve
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单项选择题
Susan is not very intelligent, ______ work very hard.
A．not does she
B．either does she
C．or does she
D．neither does she
单项选择题
In a second hand bookshop, Billy came across a book which he thought was certainly a ______ edition.
A．rare
B．scarce
C．seldom
D．hardly
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