1£®You must be careful with the camera. It costs!

2£®You may feel all the training a waste of time, but I'm a hundred percent sure later you'll be grateful you did it.

3. Can/Could I have a word with you? It won't take long.

4£®The traffic is heavy these days. I might arrive a bit late, so could you save me a place?

5£®I should have handed in my homework yesterday, but unfortunately I forgot about it totally.

6£®You could have got(get) better grades in the last examination, but you were so careless.

> (dress) up as policemen and enjoying himself.