Ifpaymentisnotreceived,legalactionwillbeouronly________.

Thereisadeadlock(僵局)inthediscussionwhenneithersidegives________totheother.

The syntactic rules of any language are ______ in number.

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

Johnson was ________ unknown before running for the presidency.