50. The lazy boy got up very late and went to school in a hurry. When he arrived at school

问题补充：

50. The lazy boy got up very late and went to school in a hurry. When he arrived at school, he found that he had put his socks on .

A. outside

B. inside out

C. side out

D. back out

答案：

A. outside

(答案→)B. inside out

C. side out

D. back out

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