问题描述：
有些个英语句子,我不懂,
1,This is a picture（ ）a classroom
A,on B,in C,of D,at
2,Hello,Henry!（ ）is Emma
A,This B,He C,SHE D,that
1,This is a picture（ ）a classroom
A,on B,in C,of D,at
2,Hello,Henry!（ ）is Emma
A,This B,He C,SHE D,that
问题解答：
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