Eugene’s never willing to change any of his opinions. It’s no use _____ with him.

Please write me and tell me yourself.

Do you know ____________ the population of China is?—Yes, it has the __________ population in the world, about 1.3 billion.

After a short time, the bad news had ______all over the city and everybody knew it．

The Changjiang River is too wide for so young a boy to swim_____.[ ]