Now the air in Yancheng is _______ than it used to be . Something must be done to stop it .

It may take a few week1s for your application to be ___.[ ]

affic problems have severely affected economic development. , we must spare no efforts to solve them.

The boy was sad to find the gold fish he ________ died yesterday.

Where is Tom We can’t find him anywhere.——Perhaps he_____home.