The thief took away the woman ’s wallet without ________.
A、beingseenA
without是介词，其后的动词必须用动名词形式。根据句意，此句需要用被动形式，所以答案是A。
This is an important problem _______ too few social scientists have researched.
______movesonascaleofthenationallanguage,dialects,andindividualwaysofcommunication.
Modern English words man, woman, child, eat, fight, etc, originate from ______.
_______ is a fact that English is being accepted as an international language.
Acompoundisthecombinationofonlytwowords.
