Complete the sentences with 'do' or 'make' in the correct grammar tense.

1) You must **make** an effort to work harder. 2) Did you **do** any work at the weekend? 3) She is **doing** nothing. 4) I've **made** my decision. I'm going to go back to university. 5) We put up our tent, **made** a fire, and had a hot drink.