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

Thereisadeadlock(僵局)inthediscussionwhenneithersidegives________totheother.

Youngerchildrenarecurious________howthingswork，andmanyofthemwanttotakeaparteverythingwithintheirreach.

Ifpaymentisnotreceived,legalactionwillbeouronly________.

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