3. The teacher was very happy because of her (完美的) homework

1. His (进步) made us happy.

2. It's not difficult to (发明) such a thing.

5. We are having a family meeting and we are talking about the ways our life.

   A. improve   B. improved

   C. to improve   D. to improving

4. The rapid of our country makes us feel happy.

   A. develop   B. development

   C. developed   D. to develop

3. you ever to the history museum?

   A. Did;go   B. Will;go

   C. Have;gone   D. Have;been

2. —Look!They are working hard on math.

--I think they can a lot.

   A. invent   B. collect   C. progress   D. make

1. —Do you know the famous over there?

—Of course I do.

   A. perform   B. performer

   C. performance   D. performor

4. The dog can find food (it) . Don’t worry about it.

5. Our school is very (peace) on weekends.

3. My grandmother encourages me (learn) to do housework to help my mother.

2. I think Liu vShenglan is (usual) because he is so old but has helped so many people.