我刚才看到杰克踩在香蕉皮上滑倒了。I saw Jack ______ ______ ______ ______ ______just now.
It is necessary that a college student ______at least a foreign language.
Sarah hopes to become a friend of ______shares her interests.
______leaves the room last ought to turn off the lights.
. It is generally considered unwise to give a child _____he or she wants.
_____ the 2000 Olympic Games will be held in Beijing is not known yet.