Clearly, development aid together with food _____ the long-term solution to the problem of poverty. [ ]

you have a brother—Yes. His name is Peter.

It’s raining all day , so I ________ stay at home.

The air pollution is terrible.—It will be worse_____ we take action to protect the environment.

How long have you been away from your hometown — It has been twenty years ________ I went to college and work in Beijing.