Complete the sentences with one of the idioms in the correct form:

1. keep a secret,
2. keep a straight face,
3. put in time,
4. put on an act,
5. put right,
6. keep in touch,
7. keep one's chin up,
8. put the cart before the horse,
9. keep one's word,
10.keep one's head

He __________________________________fixing up his house and now it looks very beautiful.