单项选择题

We can improve our speeches and writings ______.

A．by using words at random
B．by using words with care and accuracy
C．by using beautiful words we like
D．by using words which are grammatically right
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单项选择题
The teacher's insistence ______ high standards resulted in excellent work.
A．on
B．in
C．to
D．with
单项选择题
If only we ______ a phone! I am tired of lining up outside the public phone box.
A．have
B．had
C．will have
D．are to have
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