—What is your brother doing in the study? —He ________ his homework.A. is doing B. did C. does
Some polluting factories _____by Beijing government soon in a few months.
My parents will buy a piano for me if I _____ good grades in the tests.
I used to be afraid to speak in front of public before, but recently I _____ a lot.
We often talk in groups and share our ideas with _____.
Many people think that English is _____ of all the subjects.