.The house caught fire while they were away. It must have been set on fire by someone.A.

发布时间：2020-08-16 09:38:14

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The house caught      fire while they were away. It must have been set      on fire by someone.
A. a; a
B. a; /
C. /; a
D. /;/

网友回答

A. a; a
B. a; /
C. /; a
(答案→)D. /;/
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