Twenty miles _________a long way to cover.
—Why don’t you wear your jogging shorts, mum?—Well, my legs are too skinny, if you ______ know.
Tourists are now coming to Ping’an village in large numbers, ___________ they would never have stopped, had it not been Mo Yan’s hometown.
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.
It's ten years since the scientist _______to discover the valuable chemical.
I called Bruce many times yesterday, but I couldn’t get through. His brother ____ on the phone all the time.