X.

1. d

2. c

3. a

4. b

5. a

6. c

7. b

8. a

9. d

10. c

XV.

1. People are very willing to donate to charity.

2. Stop eating sweets at night if you don't want to have a toothache.

3. Dave has been fond of skiing since he moved to Australia.

4. I really enjoy playing musical instruments but I don't have much free time to play

5. Doing exercise everyday is an efficient way to keep fit and avoid diseases.

XVI,

1. He is a big fan of beach volleyball.

2. She is keen on riding a bicycle around the park in the afternoon.

3. My grandfather needs to have a surgery for his heart problem.

4. Lam has taken part in many volunteer campaigns up to now.

5. They have raised funds to help disable children since early 2009.

4. favourite

5. difficult

6. interesting

7. advice

8. hot