Here are the corrections for the sentences:

8. My brother is going to visit me tomorrow. But I **don’t** feel well enough to go to the station to pick him up.

9. In a few minutes’ time when the clock **strikes** six, I will wait for you here.

10. If you come at seven, I will work in **my** garden.

Corrected sentences:

8. My brother is going to visit me tomorrow. But I don’t feel well enough to go to the station to pick him up.

9. In a few minutes’ time when the clock strikes six, I will wait for you here.

10. If you come at seven, I will work in my garden.