Many cities issued a warning of air pollution for PM-2.5 readings, which became
Concern of all the people
| A．the; the | B．the;/ | C．/;a | D．an;a |
_______ will win is still a question
| A．Whoever | B．Who | C．Whomever | D．Whom |
It was a long time before she_________ to his words.
| A．caught on | B．went on | C．put on | D．held on |
___ is known to us all is ____ the sun is bigger than the earth.
A It; that B What ; that C What ; how D That; that
The state-run company is required to make its accounts as _________ as possible for its staff to monitor the use of the money.
| A．punctual | B．accurate | C．vertical | D．transparent |
The reasonhe was late for school washe had to send his mother to a hospital.
| A．which; that | B．why; that | C．for which; because | D．what; why |