1 It's so different a question.I think he will have problems

1 It's so different a question.I think he will have problems_______.
A work it out B working it out
C in working out it D work out it
2 These aren't enought chairs.Would you please ________ ones here?
A to bring another three B bring more three
C to make three other D bring three more
she is a happy girl,she has nothing _____
A to worry B worry about C to worry about D worring