单项选择题

The designer has applied for a ______ for his new invention.

A．tariff
B．discount
C．version
D．patent
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单项选择题
The financial problem of this company is further ______ by the rise in interest rates.
A．increased
B．strengthened
C．reinforced
D．aggravated
单项选择题
These books, which you can get at any bookshop, will give you ______ you need.
A．all the information
B．all the in formations
C．all of information
D．all of the in formations
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