13. He can’t ______ any new jobs at this time. He already has more than he can do.
Don’t keep your mouth ___ if you want to improve your spoken English.
My classmate, Li Ming, was highly praised for ___ a good deed.
Sunglasses can ___ us from strong sunlight. A. hold B. prevent C. protect D, make
There are many pine trees on ___ of the street.
His father feels ___ his duty to help others.