find the mistake
we went to the cinema to spend the time until the train arrived
- I was alone in the house since all my parents were at work

the answer is pass instead of spend
was should be has been

find the mistake
we had gone to the cinema to spend the time until the train arrived
- I have been alone in the house since all my parents were at work

find the mistake
Women are,on purpose,paid 25% less than men.