The teacher had caught a cold these days, ______ she still worked very hard.A、bu

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问题 The teacher had caught a cold these days, ______ she still worked very hard.

选项 A、but
B、and
C、or

答案 A

解析前后两句表示转折的意思，因此选A。

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Theteacherhadcaughtacoldthesedays,______shestillworkedveryhard.A、bu