2B Present perfect + for / since, present perfect continuous

ex a: 2 ´s been playing / 3 hasn't been feeling / hasn't been / 4 ´ve been looking / 5 have you been doing / 6 ´s been reading
ex b: 2 A have you been working / B 've working; for  / 3 A have you been going out / B 've been going out; since / 4 A has Penny been / B 's been single; since / 5 A have you had / B 've had; for / 6 A has Pete been trying / B 've had; for / 7 A has your sister wanted / B 's wanted ; since / 8 A have you known / B 've kown; for