单项选择题

Although he has taken a lot of medicine, his health ______poor.

A．proves
B．remains
C．maintains
D．continues
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单项选择题
Selecting a mobile phone for personal use is not an easy task because technology ______so rapidly.
A．is changing
B．has changed
C．changed
D．will change
单项选择题
I'm going to the supermarket this afternoon. Do you have anything______
A．to be buying
B．to buy
C．for buying
D．bought
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