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        1. I am surprised to see you not smoking. You ______.
          A.a(chǎn)re used toB.were used toC.used toD.used to be
          C

          試題分析:be used to sth習(xí)慣于某事;used to do sth過去常常做某事. sth be used to do sth某物被用來做某事。句意:看到你不吸煙了,我很吃驚。你過去常常吸煙。結(jié)合語境可知選C。
          點(diǎn)評:used to的用法比較固定,需要注意的是used to do表示過去常常做某事,be used to表示習(xí)慣于某事。前者to是不定式符號(hào),后接動(dòng)詞原形。后者to是介詞,后接名詞或者名詞性短語。Used to do結(jié)構(gòu)中use相當(dāng)于行為動(dòng)詞,有詞形變化。Be used to中used相當(dāng)于形容詞,無詞形變化。
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