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.
| A．suffering |
| B．suffer |
| C．suffered |
| D．are suffering |
The country has _____ several wars in the past century and people there are still living a poor life.
| A．set down | B．joined in |
| C．added up | D．gone through |
The English teacher told us this morning that we _____ an exam at the end of this month.
| A．will have | B．would have |
| C．have had | D．had had |
Some students cheated in the exam, which _____ our teacher deeply.
| A．settled | B．ignored |
| C．recovered | D．upset |
The most important thing is to keep _____ when you get into difficulties.
| A．quiet | B．calm | C．still | D．silent |
Mom called me yesterday, asking me _____ I was getting along well with my English study this term.
| A．when | B．how | C．whether | D．why |