The milu deer is ___ deer that ___ common in China long ago.

 -What do you do yesterday afternoon?-I went to the bookstore，___ some books and visited my uncle.

The government has set up a working party to look into the problem of drug ________.

In our school students are ________ according to how much they know and how old they are.

You don't ___ to go there if you have no time.