6 Add prefixes un-, dis-, over-, under-, mis- or re- to the words in bold to complete the sentences.
1 I misunderstood his directions and got completely lost.
2 Discipline is very important to us. We don't like the children to disobey the teacher.
3 Shall I throw these boxes away, or can we reuse them for something else?
4 It's a very unusual situation. Nothing like this has happened before.
5 I underestimated how long the journey would take. It took an hour longer than I expected.
6 The old man walked around the corner, and disappeared. We never saw him again.
7 I don't know how you find anything in this office. It's so untidy!
8 I have to renew my driving licence because it has expired.
9 They use children in their factories, which I find completely unethical.
10 I'm afraid I have to disagree. I don't think that's right at all.