Many children are left alone in the countryside. Let’s try our best ____ them.
A．help B．helping
C．to help D．helps
—What about _____ a rest?
—Let's go for a walk.
A．to take B．take
C．taking D．taken
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
She’s not strong enough _____ walking up mountains.
A．to go B．going
C．go D．went
It was time for class. Mr. King asked all the children _____ down quietly.
A．sit B．sat
C．to sit D．sitting
Paul made a nice cage______ the little sick bird till it could fly.
A．keep B．kept
C．keeping D．to keep
