相关题目
When you study in the United States, usually you have to buy your own health （ ）.
In the class the teacher asked the students to （ ）their bad habits.
If your letter is over weight, you must pay for the （ ）.
The dog （ ）the rabbit but could not catch it.
If you have any problems during your study here, please do not （ ）to call me for help.
As a teacher, you should not （ ）the students from asking questions in class.
When traveling alone in the mountains, you’d better take a （ ） with you in case you get lost.
It is not （ ）for me to return all the books to the library now because I still need some of them for my research.
This morning in the class, our teacher lost his （ ）at last because he could not stand any more.
Several loudspeakers are （ ）from the ceiling and we can hear the speaker very clearly.
