(单选题)
______ a child and you will find that he is happy every day in whatever he does.
A.Observe
B.To observe
C.Observed
D.Observing
参考答案:A
知识点:
(单选题)
______ a child and you will find that he is happy every day in whatever he does.
A.Observe
B.To observe
C.Observed
D.Observing
参考答案:A
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