单项选择题

The economy continued to exhibit signs of decline in September.

A. play
B. send
C. show
D. tell
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单项选择题
Medical facilities are being upgraded.
A. renewed
B. repaired
C. improved
D. increased
单项选择题
You have to be patient if you want to sustain your position.
A. maintain
B. establish
C. acquire
D. support
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