It is reported that in our country cities ________ heavy air pollution that is 30 percent above the national standard or higher should try to meet standards by 2030.
I’ll get my secretary ___ the letter.
Mary hasn't decided whether to take up tennis, basketball, or ___.
You’d better come to my home tomorrow, because ___ to show you some of my best stamps.
“Do you mind ___? ” “Go ahead.”
___ darker now, we had to stay in the village for the fight.