Complete the sentences with the particles in the box.

(Hoàn thành câu với các trợ từ trong hộp.)

out (x2)                down with             down on                away

1. People are throwing _______ tons of food each year. This is such a waste!

2. Shopping malls are a popular place for teens to hang  _______ one another these days.

3. The city council wants to cut _______ construction noise by 20% in the next five years.

4. The researchers carried _______ a study about people's attitudes towards their cities.

5. Many people come _______ the flu in winter.