Questions about example sentences with, and the definition and usage of "Orienteering"

Q: Orienteering is a sport in which you have to navigate round some checkpoints in a forest using a compass and a very detailed map. This sport (1) ... in Sweden many years ago and since then it (2) ... in popularity greatly. The checkpoints are very well hidden and they are very difficult to find. The best orienteers must be very fit, read maps well and make quick accurate decisions.
Last year was the first time I (3) ... orienteering. No sooner (4) ... myself in the forest than I got totally lost! I (5) ... for the first checkpoint for nearly 20 minutes but I couldn't find it though it (6) ... only 200 meters away from me. I (7) ... hard to remember what instructions I (8) ... before I set off.
My friend who is an expert orienteer was able to finish two hours before me, and when I got back, wet and exhausted, he (9) ... his clothes and (10) ... in the car drinking tea.
1. 1) was invented 2) invented 3) has been invented 4) was inventing
2. 1) was gained 2) was gaining 3) has gained 4) had gained
3. 1) have done 2) have been doing 3) was done 4) had done
4. 1) I had found 2) was I found 3) had I found 4) I found
5. 1) was searched 2) was searching 3) have been searching 4) had been searching
6. 1) hid 2) was being hidden 3) was hid 4) had been hidden
7. 1) tried 2) was tried 3) have tried 4) have been trying
8. 1) gave 2) was giving 3) had been given 4) had been giving
9. 1) changed 2) has changed 3) was changed 4) had changed
10. 1) sat 2) has been sitting 3) is sitting 4) was sat
Guys, please, help me!!!)))

Q: Orienteering is a sport in which you have to navigate round some checkpoints in a forest using a compass and a very detailed map. This sport (1) ... in Sweden many years ago and since then it (2) ... in popularity greatly. The checkpoints are very well hidden and they are very difficult to find. The best orienteers must be very fit, read maps well and make quick accurate decisions.
Last year was the first time I (3) ... orienteering. No sooner (4) ... myself in the forest than I got totally lost! I (5) ... for the first checkpoint for nearly 20 minutes but I couldn't find it though it (6) ... only 200 meters away from me. I (7) ... hard to remember what instructions I (8) ... before I set off.
My friend who is an expert orienteer was able to finish two hours before me, and when I got back, wet and exhausted, he (9) ... his clothes and (10) ... in the car drinking tea.
1. 1) was invented 2) invented 3) has been invented 4) was inventing
2. 1) was gained 2) was gaining 3) has gained 4) had gained
3. 1) have done 2) have been doing 3) was done 4) had done
4. 1) I had found 2) was I found 3) had I found 4) I found
5. 1) was searched 2) was searching 3) have been searching 4) had been searching
6. 1) hid 2) was being hidden 3) was hid 4) had been hidden
7. 1) tried 2) was tried 3) have tried 4) have been trying
8. 1) gave 2) was giving 3) had been given 4) had been giving
9. 1) changed 2) has changed 3) was changed 4) had changed
10. 1) sat 2) has been sitting 3) is sitting 4) was sat
Guys, please, help me!!!)))