时态的单选一道1.Man ____ profit, unaware of the harm he has done to
时态的单选一道
1.Man ____ profit, unaware of the harm he has done to the environment.
a is always pursuing
b was always persuing
c had always pursued
d had always been pursuing
选什么?为什么?
1.Man ____ profit, unaware of the harm he has done to the environment.
a is always pursuing
b was always persuing
c had always pursued
d had always been pursuing
选什么?为什么?
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