中国石油大学 / 中石油
正确率:100%
15.(2.0分) Dr Bethune worked hard as if he ______.
A、never had felt tired
B、had never felt tired
C、never felt tired
D、was tired never
A、never had felt tired
B、had never felt tired
C、never felt tired
D、was tired never
参考答案:
佳题速递: