10. How long have you been surfing the Internet? (6 hours)

__________________________________________________

9.　 How long has Lucy been dancing in the room? (one and half hours)

_____________________________________________________

8.　 How long has Tim been swimming in the pool? (2 p.m.)

_____________________________________________________

7.　 How long have you been reading that book? (last week)

_____________________________________________________

6.　 When did she begin playing the piano? (9 o’clock in the morning)

_____________________________________________________

5.　 How long has she been playing the piano? (forty-five minutes)

_____________________________________________________

4.　 How long have they been studying English? (ten years old)

_____________________________________________________

3.　 How many stamps do you have now? (275)

_____________________________________________________

2.　 How long have you been collecting stamps? (two years and a half)

_____________________________________________________

1.　 What do you collect? (stamps)

_____________________________________________________