Помогите пожалуйста раскрыть скобки 
1.   
Open the brackets using the proper
form of the Subjunctive Mood.

a)      If my sister (to be)
________________ a musician, I should be very happy.

b)      If Barbara (to get) ________________
up at half past eight, she would have been late for school.

c)       I (to buy) ______________________
these shoes, if they were not too big for me.

d)      If he (not to go) __________________
to London last year he wouldn’t have heard that singer.