单项选择题

Dr. Anderson is aware that we still have______long way to go in improving human living conditions and in fighting sickness______.

A．the: where it is found
B．a: wherever it is found
C．a: wherever is it found
D．/: where is it found
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单项选择题
Your brother would certainly have attended the proceedings______.
A．if he didn’t get a flat tire
B．if the flat tire hadn’t happened
C．had the tire not flattened itself
D．had he not had a flat tire
单项选择题
The Big Ben is one of London’s best-known landmarks, and it looks most spectacular at night when the clock faces are______.
A．enlightened
B．glistened
C．illuminated
D．illustrated
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