题目内容
18、Children should be warned that it’s dangerous to open the microwave oven it is still working.
A. until B. after C. before D. while
试题答案
18、D
相关题目
Children should be warned that it's dangerous to open the microwave oven ________ it is still working．
- A.until
- B.after
- C.before
- D.while
Children should be warned that it’s dangerous to open the microwave oven it is still working.
A. until B. after C. before D. while
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