A. PRESENT PERFECT TENSE Example: The earth has been here for billions of years (be).

1. We ____ problems with our new car recently. (have)
2. ____ on anything interesting lately? (you work)
3. I ____ care of my neighbor's cats while they are away. ( take)
4. John and Mary ____ with each other since last week. (quarell)
5. It ____ hard since last night (rain).​