问题补充:
—Who’s in the room? — Mr. Brown is. He a letter now.
A. writes
B. write
C. writing
D. is writing.
答案:
A. writes
B. write
C. writing
(答案→)D. is writing.
解析:句意:——谁在房间里?——布朗先生。他现在正在写信。根据时间副词now可知此处用现在进行时be doing, 因为主语是he, 故谓语用is writing,故选D。
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