Thethieftookawaythewoman’swalletwithout________.
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 。
______movesonascaleofthenationallanguage,dialects,andindividualwaysofcommunication.
Linguistscanconcentrateonalltheaspectsoflanguageatonce.
By"languageacquisitionisprimarilytheacquistionofthegrammaticalsystemoflanguage",linguistsmeanthat______.
Accordingtothe"principles-and-parameters"theory,"principles"refertohighlyabstractpropertiesofgrammarwhichareappliedtolanguageingeneralandwhichgeneratephrasesandatthesametimerestrainthepowerofMovea,while"parameters"allowgeneralprinciplestooperateincertainrestrictedways,accordingtowhichparticulargrammarsofnaturallanguagesvary.
Hesaidthatthegroup________himaletterandaskedhimtogothereforaninterview.
