Some government officials in the USA have pointed out that the death of Osama Bin Laden means keen vigilance (警戒) _____ the end of terrorism[ ]

Do you know the man_______ saved five people in the fire

a good cook at home and takes good care of the children,and _____his wife.

56. The shopkeeper _____ the tramp stealing sweets from thenew supermarket and _____ him.

__ with some research materials, he decided onthree possible approaches in his experiment