_______isafactthatEnglishisbeingacceptedasaninternationallanguage.

Thevolunteerswouldrathergobytrainthan________.

Accordingtothe"principles-and-parameters"theory,"principles"refertohighlyabstractpropertiesofgrammarwhichareappliedtolanguageingeneralandwhichgeneratephrasesandatthesametimerestrainthepowerofMovea,while"parameters"allowgeneralprinciplestooperateincertainrestrictedways,accordingtowhichparticulargrammarsofnaturallanguagesvary.

He talked a lot about things and persons ________they remembered in the school.

Younger children are curious ________ how things work ，and many of them want to take apart everything within their reach.