问题
_____ is hard is to do good all one’s life and never do anything bad.
A:He
B:It
C:That
D:What
B:It
C:That
D:What
正确答案是：
同类题型
Mr Green’s never been to Canada, ________
Not only late, he also forgot his book.
Where is Ben—He ________ to the teachers’ office He will be back soon
Have you searched the kitchen for your car key—No. It was in the study I remember I left it.
Do you know that some new types of energy _____ very little and never run out—Yes, I agree.