My brother ______singing ______ dancing while I _____ dance _____sing.
______ the Internet is of great help, I don’t think it is a good idea to spend too much time on it.
The first World Cities Day of the UN, _______on Oct.31, 2014 in Shanghai, focused on leading urban transformation.
—You should take exercise in your spare time.—I want to,but the little time I have outside of school is by part-time job.
The good thing about today’s children is that they can_____ very easily to new environments.
As a teacher, it is my _________ to make the students devoted to their study.