—How much is _______ for a schoolbag? —Experts say students should carry_______ more than 10 or 15 percent of their body weight.
__________ the Internet is bridging the distance between people, it may also be breaking some homes or will cause other family problems.
—I don't know what I should have done without your help. — __________.
A major issue was put forward by some representatives at the conference __________ the teachers in the remote areas were underpaid.
I have little doubt __________ the plan will succeed.
__________ many benefits, cell phones have brought for their owners a number of new headaches.