Neither Jim nor his cousins （ ） to America, but （ ） of them know the country very well.
（A）have been; all
（B）have been; both
（C）has been; all
（D）has been; both
Many a student （ ） something about Abraham Lincoln.
（A）have known
（B）knows
（C）is known
（D）are known
How close parents are to their children （ ） a strong influence on the development of the children’s character.
（A）have
（B）has
（C）having
（D）had
