—Do you plant trees in spring, Mike?
—Yes. Many trees ________ in our city every year.

Spanish ________ as the official language in Cuba.

— Were you allowed to go to your cousin’s birthday party?
—No, I        .

The windows          after school is over.

—Where ______cotton _____?
—Oh，I don’t know.Let’s ask Mr Wu.

—Our school _________ in 1876. 
—Wow, it has a very long history.

At that moment，he was last __________ the room with his friends．

——Do you like reading books?
——Yes. Each of us      to do more reading in and after class.

Some animals in the zoo die of hunger because they_____enough food.

People should _____ from throwing the rubbish everywhere .