简答题 A teacher should have patience in his work.

简答题 Air is all around us.

简答题 All that glitters is not gold.

简答题 A sign at the bus stop helps you to know which bus to take.

简答题 Americans usually eat three meals a day.

简答题 A good memory is a great help in learning a language.

简答题 A lot of natural resources in the mountain area will be exploited and used.

简答题 After I get home, I'll call you.