In order to make up for the lost time, they are working ______.
—______the population of China?—______over 1,300,000,000.
The sun is shinning, ______ it isn’t warm today.
—I think we should work harder than before.—I agree________ you.
Jessica, ______ late for school again. — Sorry, I won’t.
It's getting dark. We'd better go home_______.