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题目内容
（河套学院-大学英语）
21. (单选题) -What did you do last night,Bob?
-First I did my homework,and then I played ______ piano for half ______ hour.(本题3.0分)
A、 the；a
B、 /；an
C、 the；an
D、 a；the
-First I did my homework,and then I played ______ piano for half ______ hour.(本题3.0分)
A、 the；a
B、 /；an
C、 the；an
D、 a；the
参考答案