Complete the sentences with the correct forms of the verbs in brackets. Don't use contractions.

Write 2–3 words in each gap.

The students [ ] to the teacher attentively. (to listen)

My dad [ ] in the garden from 9 till 11 am. (to work)

I [ ] a book at 8 pm yesterday. (not to read)

They [ ] in the mountains when they came across a beautiful waterfall. (to hike)