—I don't think I can walk any further.— __________; let's stop here for a rest.
He was in poor health,so the doctor________him to drink wine.
—You see,I’m poor in maths,you are not good at English,and...—That’s________we should help each other.
______I am concerned,the price of the computer is much too high,so I can’t afford it.
Teachers recommend parents_____their children under 12 to ride bicycles to school for safety.
The following are some popular websites________people can sell goods to each other.