2、an,______universitystudentfromEurope,teachesme______artinhersparetime.A.a;不填B.a;theC.an;theD.an;不填()19.I you inLondon.Howlong here?A.don'tknow;are;hadyoubeenB.didn'tknow;were;haveyoubeenC.didn'tknow;are;haveyoueD.don'tknow;were;areyou()20.—Oh,youhavemadet