There ________ elephants if we don’t protect them now.

Is that your bike, in front of the black one?－No. It’s ______.

I like these photos and they can ____me _____the life living in the countryside.

______ milk do you want? 　　— Four bottles. [ ]

Do you think a radio is useful in learning English? —Sure. A radio can _____ listening English songs and reports.