It still puzzles today"s scientists _____ some mammals produce their young _____
题型：吉林省模拟题难度：来源：
It still puzzles today"s scientists _____ some mammals produce their young _____ others lay eggs to produce
their offspring (后代). |
| [ ] |
A. that; while
B. what; while
C. that; as
D. what; as |
答案
| A |
举一反三
Doing your homework is a sure way to improve your test scores, and this is especially true ____ it comes
to classroom tests. |
| [ ] |
A. before
B. since
C. when
D. after |
| I"ll never forget such a beautiful place _____ I spent my childhood there with my grandma. |
[ ] |
A. that
B. although
C. where
D. because |
Losing weight is no easy task. A lot of people who lost weight gain it back over time and end up
back ____ they started. |
| [ ] |
A. when
B. where
C. since
D. after |
| Ballet is amazing; _____ you go, you are likely to find yourself going again and again. |
| [ ] |
A. as
B. once
C. unless
D. while |
| Mr. Brown arranged for the taxi to come at six _____ she would not have to wait long at the station. |
| [ ] |
A. so that
B. even if
C. before
D. because |
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