Choose the correct alternative. 1 My sister has been / was interested in medicine ever since she has been / was a child. 2 How long have you studied / did you study before you have qualified / qualified? 3 Where have you first met / did you first meet your boyfriend? 4 Is this the first time you've cooked /you cooked pasta? 5 We have wanted / wanted to go to the cinema last night, but there haven't been / weren't any seats. 6 What can we do? I'm sure something has happened /happened to Alex. We've been waiting / We waited over an hour and he hasn't phoned/ he hasn't been phoning yet. 7 I've posted /I posted that CD to you three weeks ago. If you still haven't reccivedL didn't receive it, please email me immediately. 8 I'm exhausted because I've worked / I've been working in a restaurant for the past three weeks. I've never realised /I never realised how hard it is!