C.
1. visit, was
2. work
3. finished
4. knows
5. 've been thinking
6. 've completed, didn't start
7. bought
8. tried
9. has been teaching
10. travelled
A.
1. has crashed
2. live
3. have seen, will see
4. has stolen
5. will graduate
6. walks
7. lived, was
8. lost, was, has found, brought, went
9. went
10. had
B.
1. was discovered
2. lived, was
3. went
4. enjoyed
5. are getting married
6. talked, is
7. had
8. have visited
9. didn't finish
10. have eaten
