Please stop to have a rest. I think, to teenagers, health is as __________ as their study.
—____ is it from here? —It’s about five minutes’ walk.
The old man lives ____ but he doesn’t feel ____.
Li Lei isn’t ____ Liu Ming.
Please be quick, or we will have no time ____ have lunch.
—Mom, my classmates invited me ____ a field trip. May I go with them? —OK.