There are so many foggy days these days. We all wonder .A. how is the air polluted B. why the air is polluted seriouslyC. what are the real reasons
--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 hea bus ____?