When I walked past the park, I saw some old people______chinese Taiji. A.do B.did C.doing
--My grandma is ill in hospital. ---_____________
.—You should ______ more water when you have a fever.
---What’s the matter ______ you? ---I have a toothache.
--- How many students are there in the school?---There are about ______.
Does he a bus ____?