Choose the correct tense
A: Look at Mark and James! They [dive|are going to dive|have been diving] from the cliff!
B: Yes, I think they [are enjoying|have enjoyed|enjoy] themselves!
A: How often [are you going|have you gone|do you go] mountain climbing, Sam?
B: I [am going|have gone|go] about once a month. I [am going|have been going|go] this weekend, actually.
A: What [do you do|have you done|are you doing] to your finger, Jane? It looks swollen.
B: I [slammed|have slammed|was slamming] a door on it yesterday morning.
A: You [have been looking|look|have looked] tired, Tom.
B: Yes, I [have been hiking|am hiking|hiked] all day.
A: What [did you did|have you done|were you doing] when the earthquake happened?
B: I [did|was doing|have done] my homework while Tim and Sally [were watching|watched|have been watching] TV.
A:[Did you ever have|Have you ever had|Were you ever having] a bad accident?
B: Yes, I once [have tripped|was tripping|tripped] on a rock and [broke|has broken|was breaking] my arm.