The little boy won"t go to sleep ________ his mother tells him a story.[ ]A.
题型：同步题难度：来源：
| The little boy won"t go to sleep ________ his mother tells him a story. |
| [ ] |
A. or
B. unless
C. but
D. whether |
答案
| B |
举一反三
The school rules state that no child shall be allowed out of the school during the day, ________
accompanied by an adult. |
| [ ] |
A. once
B. when
C. if
D. unless |
| ________ our manager objects to Tom"s joining the club, we shall accept him as a member. |
| [ ] |
A. Until
B. Unless
C. If
D. After |
| ________ they decide which college to go to, students should research the admission procedures. |
| [ ] |
A. As
B. While
C. Until
D. Once |
| John thinks it won"t be long ________ he is ready for his new job. |
| [ ] |
A. when
B. after
C. before
D. since |
—Our holiday cost a lot of money.
—Did it? Well, that doesn"t matter ________ you enjoyed yourselves. |
| [ ] |
A. as long as
B. unless
C. as soon as
D. though |
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