I _ the song sung in English.
A. heard
B. consider
C. know
D. think
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This done,we_home,
A. went
B. go
C. at
D. in
We must adapt our thinking to the changed conditions.
A. 对
B. 错
The concert given by their friends was a success.
A. 对
B. 错
The boy looked up with a pieased expression.
A. 对
B. 错