Can you check these for me.
1 Sam had been working for ten hours when he fell asleep.
2 Sue has been swimming since she was young.
3 Despite his weight problem, Joe has been eating fatty food and chocolate since his return to England.
4 When i arrived, they’d been waiting for twenty minutes.
5 When the company went bust, i’d been working there for five years.
6 i’ve been fighting this cold for a week now.
7 When i saw the girl walking into the resaurant last night, i could have sworn that i’d met her before.
8 The Goverment has been keeping UFOs secrect since the incident at Roswell.
9 My sister’s tried to give up smoking for years now.
10 I’d never have guessed that Russell Crowe dies at the end of Gladiator.
11 Before the police turnrd up, the people had been rioting for two hours.
12 Have you ever had the feeling that you’re being followed.

A= PRESENT PERFECT CONTINUOUS
B= PAST PERFECT CONTINUOUS
C= NEITHER