Complete the sentences with must, mustn’t or needn’t.
Jim gave me a letter to post. I *** forget to post it.
We haven’t got much time. We must hurry.
We’ve got plenty of time. We needn’t hurry.
We have enough food at home so we needn’t go shopping today.
Jim gave me a letter to post. I must remember to post it.
Jim gave me a letter to post. I mustn’t forget to post it.
There’s plenty of time for you to make up your mind. You needn’t decide now.
You needn’t wash those tomatoes. They’ve already been washed.
This is a valuable book. You must look after it carefully and you mustn’t lose it.