单项选择题
Franklin's ability to learn from observations and experience（）greatly to his success in public life.
A.contributed B.owed C.attached D.related
单项选择题 He made an excellent speech, and everything he said was to the（）
单项选择题 From this amount you need to（）something to cover utility bills.
单项选择题 You didn't have to write the essay if you didn't want to. It was（）
