题目内容:
TheNationalInstitutesofHealthfoundthat A.unproventherapiesarecommonlyusedbypeople
B.chronicinsomniaisjustaminorhealthyproblem
C.thesideeffectsofcognitive/behavioraltherapydeserveourattention
D.dietarysupplementscanbeintroducedtoinsomniasufferers
参考答案:
答案解析: