David, is that _____ English teacher–Yes, he is ___. He is very caring.

How do you find Mr Li’s lecture? — Good indeed. It_______ many problems we have come across in our study.

It’s a common scene in the film Tangshan Earthquake that families cry helplessly over _____ is left of their homes.

Eating too much fat can ________ heart disease and cause high blood pressure.

It’s a good way to learn about science there because you can ________ ideas.