Walking up and down the stairs is a good kind of exercise to stay _________. [
题型：同步题难度：来源：
| Walking up and down the stairs is a good kind of exercise to stay _________. |
| [ ] |
A. health
B. healthy
C. healthily
D. healthful |
答案
| B |
举一反三
| Listen up, please. Our head teacher has _____ to tell us. |
| [ ] |
A. important something
B. important anything
C. something important
D. anything important |
| we"ll have a ______holiday in summer every year. |
| [ ] |
A. two months
B. two-month
C. two-months
D. two-months |
| Don’t throw away your old clothes, it’s very ______. |
| [ ] |
A. useful
B. wasteful
C. wonderful |
| A china cup can be used again. It’s ______. |
| [ ] |
A. reuse
B. reusable
C. useless |
| It will be ______ a theory（理论）without practice. |
| [ ] |
A. useless to learn
B. useful learning
C. usefully to learn |
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