单项选择题

When climbing the hill, John was knocked unconscious by an () rolling stone.

A. untouched
B. unfamiliar
C. unexpected
D. unbelievable

<上一题目录下一题>

热门试题

单项选择题

()explain it to him, he still didn’t understand.

A. Hard as I tried to
B. As I tried hard to
C. Hard I tried to
D. Tried as I hard to

单项选择题

According to the writer, Adam Smith’s mistake was in believing that the division of labor().

A. was an efficient way of organizing work
B. was an important development in methods of production
C. finally led to economic development
D. increased the production of existing goods