7 Complete the sentences using the correct verb forms. Use the present perfect simple and the present perfect continuous in each sentence.
1 We (walk) for an hour and we just / reach) the lake.
2 She (read) the book for a week, but she still (not finish) it.
3 1 (wait) for an hour and he still (not call).
4 1 (be) worried about you. I (phone) you all day.