(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2.0分) A、 the；a B、 /；an C、 the；an D、 a；the

(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2.0分)
A、 the；a
B、 /；an
C、 the；an
D、 a；the

出自：大连工业大学-大学英语3

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