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英语题!急!If you are sick, please stay ______ for a few days. A.

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英语题!急!
If you are sick, please stay ______ for a few days.
A. in the bed B. in bed C. on the bed D. on bed
还有中文意思是什么?、
还有一题
1Did you help them clean their room
为什么clean不用过去式
2You'd better take ______.
A. some medicine B. some medicines C. medicines D. any medicine 为什么选择某某答案
3______ Joe and Jill like China?
A. Is B. Does C. Do D. Are
,After a day's work he is very ______.
A. bored B. sad C. tired D. angry
After a day's work什么意思
选B,意思是
卧病在床,卧床;呆在床上;在床休息
而A只有呆在床上的意思.
on直接出物体表面,in才有陷进去得到意思,在床上不能说是接触表面,所以用on.