Verified answer

Task 2

Here are the matched parts of the body idioms:

1. a pain in - c) the neck
2. to talk - a) behind smb's back
3. to learn - f) by heart
4. to have very - d) thick skin
5. to have - e) a hand
6. to give smb - e) a hand

And the remaining idiom is:

    7. butterflies in - b) stomach

Task 3

1. They did their homework before they went out to play yesterday evening.
2. She had watered all the flowers by 5 o'clock.
3. Jill was not at home when I came. She had gone out.
4. Her husband forgot about her birthday. Mary was very angry.