.
The reason for his success is ______ he worked very hard.
| A．why | B．that | C．whether | D．how |
11. “Do you prefer ________ rather than ________ by bus?” asked my mother.
| A．walking there; going | B．to alk to there; go |
| C．to walk there; go | D．walking to there; going |
10. My brother was born on January, 10th, 1990 ________ it was snowing heavily.
| A．which | B．when | C．in which | D．That |
9. “Do you have any questions ________ clear to you?” the teacher asked.
| A．which are not | B．that isn’t | C．not to | D．To |
8. “Please make ________ at home,” the landlady said to the children.
| A．yourself | B．you | C．yourselves | D．Themselves |
7. I don’t think the man is from Canada, ________?
| A．is he | B．do I | C．isn’t he | D．don’t I |