The engine of the ship was out of order and the bad weather _____ the helplessness of the crew(船员) at sea.
It is amazing that the little boy can swim ________the river ________100 meters in width.
According to the recent research, heavy coffee drinking and heart attack is not necessarily ______ and effect.
What ________surprise you gave us by wearing such funny________ at so serious a meeting!
--- How about the debate held in your class? --- ______
Knowledgeable as he is, the expert was unwilling to offer advice to ______ he thought was not qualified.