He has for three or four days.
—__________ people are there in the meeting room? —About 200.
It’s quite late now, __________ Xiao Ming is still busy with his lessons.
I visit my grandparents __________ Saturday afternoon.
The students are from England and __________ maths teacher is from China.
There are so many foggy days these days. We all wonder . A. how is the air polluted B. why the air is polluted seriously C. what are the real reasons