句型转换(共10小题,每空1分，记10分)
小题1:Jack is so young that he can’t understand it.
Jack is not old________ ________understand it.
小题2:His uncle is a doctor. His father is a doctor, too.
______his uncle and his father ______doctors.
小题3:How honest the boy is!
______an honest boy ______is!
小题4:Did you use them for keeping warm?
______they ______for keeping warm?
小题5:She found it difficult to learn English well.
She found______ _______difficult to learn English well.