This is an important problem _______ too few social scientists have researched.
D
intowhich引导的是problem的定语从句。which指代problem，into与research搭配。
Accordingtothe"principles-and-parameters"theory,"principles"refertohighlyabstractpropertiesofgrammarwhichareappliedtolanguageingeneralandwhichgeneratephrasesandatthesametimerestrainthepowerofMovea,while"parameters"allowgeneralprinciplestooperateincertainrestrictedways,accordingtowhichparticulargrammarsofnaturallanguagesvary.
Researchfindingshaveshownthatlanguageprocessingcentersaresituatedinasingleareaofthelefthemisphere.
Idon’tmind_______thedecisionaslongasitisnottoolate.