How time flies! Ten years _______ really a short time.

It’s no ____ that he seems tired and asleep in class every day.

Yang Shanzhou becomes well-known in China for planting so many trees for people.

Did you do well in ______English exam last week?—Yes, I got ______ “A” .

.“There is a great potential for the development of Sino-U.S. trade, ______ is in line with the interests of the two countries and their people,” Wu said