问题

The reason for his success is ______ he worked very hard.
A:why
B:that
C:whether
D:how;
B:that
C:whether
D:how;
正确答案是:
同类题型
These drawings are made by the three-year-old girls here.— Well, ______creative the children are!
Hardly _____ closed my eyes ___ I began to make this fantastic dream .
______fresh vegetables!- I myself grow them. Go to the balcony, and you can see more.
When shall we go and play basketball— Not until the work ________ tomorrow.