___________ we should do to protect wildlife?

I Often help my brother_____his math.[ ]

How about the pollution in the countryside?—Luckily, it’s not as serious as _______ in the big cities.

The T-shirt with Michael Jackson’s picture ____ belong to Tom. He likes him a lot.—No, it ______ be his. He dislikes black colour.

What do you want to eat ______ breakfast?—Eggs and bread.[ ]