It is impossible to cooperate with a person ________ methods are completely opposed to your own.
| A．who | B．whom |
| C．whose | D．whoever |
Hardly _______ to speak when the audience interrupted him.
| A．he began | B．he had begun | C．had he begun | D．did he begin |
—Why don’t you wear your jogging shorts, mum?
—Well, my legs are too skinny, if you ______ know.
| A．must | B．can | C．may | D．need |
Tourists are now coming to Ping’an village in large numbers, ___________ they would never have stopped, had it not been Mo Yan’s hometown.
| A．when | B．where | C．that | D．which |
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 |
It's ten years since the scientist _______to discover the valuable chemical.
| A．kept up | B．set out | C．took in | D．set about |