She’s not strong enough _____ walking up mountains.

A．to go B．going

C．go D．went

He lost his key. It made him _____in the cold to wait for his wife’s return．

A．to stay B．stayed

C．stays D．stay

—What about _____ a rest?

—Let's go for a walk.

A．to take B．take

C．taking D．taken

Many children are left alone in the countryside. Let’s try our best ____ them.

A．help B．helping

C．to help D．helps

Our English teacher often says to us,“____ English well is very important.”

A．Learn B．Learning

C．Learned D．To learning

Everyone may feel time____ very quickly when they do something interesting.

A．go by B．to go by

C．went by D．going by

— I’m looking forward to _____my parents soon. What about you?

— Me too．

A．seeing B．see

C．saw D．to see

Seeing their teacher _______ into the classroom, they stopped _______ at once.

A．walk; telling B．entering; to speak

C．enter; to tell D．walking; talking

The retired couple enjoy_____photos.They always go out with their cameras

A．take B．took

C．to take D．taking

I'm sleepy. I prefer ________ at home to going out for a walk.

A．sleeping B．to sleep

C．slept D．sleep