14. B
15. B
16. D
17. D
18. A
19. C
20. C
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1. This is the second time I have visited to Japan to attend business conference.
2. This is the first time I have ever eaten such a delicious dish.
3. This is the first time she has ever learnt to play jazz on the piano.
4. The plane has just landed for 5 minutes,
5. Jenifer hasn't seen her mother since 2014.
6. The police has hunted for the escaped criminal for 3 days.
7. Simon has written 2 songs so far.
8. I have taught English to high school students for 4 years.
9. They have ran a marathon recently.
10. She hasn't worn that dress since my sister's wedding.
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1. has been knitting
2. have read
3. Have you been waiting
4. has been learning
5. have Charles traveled
6. have been composing