Complete the sentences with the verbs in the correct form.

1 Mary looks exhausted. What has she been doing all working day?

2 How long have they known their history teacher?

3 How many times has Tim visited Sidney?

4 Jess learn has been learning Spanish words for hours, but she still doesn't remember all of them.

5 Sorry, we are late. Have you been waiting for a long time?

6 The friends have been playing chess for several hours.

7 Yas Nina been studying for a long time today?

8 My uncle has never played curling.

9 Dave has not seen his colleagues recently.

10 Melony has been writing the report all day, but she has not finished yet.