Complete the sentences with used to or didn't use to to make true sentences. 1. to a different school. 2. this book in primary school. 3. shorter than i am now. 4. out at night when i was little. 5.my instant messaging when they were young. 6. more letters,but now we usually send emails.

1. used to
2. didn't use
3. used to
4. didn't use to
5. didn't use
6. used to

1. I used to go to a different school
2. We used to use this book in primary school
3.I didn't used tobe shorter than I am now.
4.I used to go out at night when I was little.
5.My grandparents didn't used to use instant messaging when they were young.
6.People used to write more letters,but now we usually send emails.