用动词的适当形式填空While my wife _ (work) in the kitchen,I _ (sit) in

用动词的适当形式填空
While my wife _ (work) in the kitchen,I _ (sit) in the garden.I _ (look) at cars which _ (pass) in the street,when a small car _ (stop) outside my gate and a man _ (get) out.I was most surprised to see that the man was Tom.We _ (be) at the same school years ago.In those days,Tom _ (come) to our house nearly every day and we often _ (go) out together.We _ (be) great friends,but one day we _ (quarrel) and I never _ (see) him again.As he _ (get) out of his car,I _ (call) my wife and we both _ (hurry) out to greet an old friend.
In a few years the small workshop had become a lager factory.Had后面不是过去式吗,这是为什么只是become,不是became.
Now he has put an ugly stone head over the gate.
这里为什么是over不是on,on是面和面有接触,放在上面当然是有接触的了?