At times, parents find it difficult ________ with their teenage children

A．talk B．talked

C．talking D．to talk

考點(diǎn)：非謂語動(dòng)詞

You look too tired. Why not______a rest?

A．stop to have B．to stop having

C．stop having D．to stop having

—Would you mind_____the window? It's very hot.

—No, not at all.

A．open B．to open

C．opening D．to opening

How kind you are! You always do what you can ______ others.

A．help B．helping

C．helps D．to help

—What a heavy rain!

—So it is. I prefer ____ rather than ___on such a rainy day.

A．to go out; stay at home B．to stay at home; go out

C．going out; stay at home D．staying at home ; go out

He promised _____his old friend during his stay in Tianjin.

A．see B．seeing

C．saw D．to see

—Excuse me. Could you tell me ____get to the nearest post office?

—Sorry, I am new here.

A．how can I B．how I could

C．how to D．what I can

The Great Green Wall can stop the wind and sand?_____ to the rich land in the south of China.

A．move B．to move C．from moving

Animals are our close friends. We are supposed _____ them.

A．to protect B．protecting C．protect

The boy is often heard _____in the music room. He sings very well.

A．practice singing B．to practice singing C．practiced singing