问题补充:
—— Mary cleaning her room? ——No, she is .
A. Does, reads
B. Can, read
C. Is, reading
D. Does, reading
答案:
A. Does, reads
B. Can, read
(答案→)C. Is, reading
D. Does, reading
解析:此题考查现在进行时的一般疑问句的基本句式结构,be+主语+现在分词及其简略回答。Mary为单数第三人称做主语,谓语动词应用单数,所以用is,句意:玛丽正在清扫房间吗?不,她正在读书。所以选C。