The umbrella is used ______ us away from the rain.[ ]

Can I help you?—Yes, I bought this radio here yesterday, but it _____________.

When and where to spend the holiday ____ yet.—Let’s make it now.

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

How old is his father?-He is thirty ________.[ ]