They usually spend two hours _______ their homework every day.A. do B doing C to do
Smoking is not allowed in public places since May 1st. It may be a good chance for some people to ______ smoking.
--- I feel really tired.--- ________
—What did you say just now?—I asked __________.
—1 doubt if he ___________ in the discussion tonight.—I believe if he ____________his homework, he will join us.
This year our school is __________ than it was last year.