-Excuse me. Is the library open all day?- . Only from 8 a. m to 4 p. m.
---What’s the matter ______ you? ---I have a toothache.
--- How many students are there in the school? ---There are about ______.
Does hea bus ____?
Tom knows Chinese well. Hesay some English words.
---______ does it take you to go to Beijing by train? ---About two days.