That is secret．________．
That is secret．________．
A.Only knows Mary how to do it
B.Only does Mary know how to do it
C.Only Mary knows how to do it
D.Mary knows only how to do it
答案及解析： C
That is secret．________．
A.Only knows Mary how to do it
B.Only does Mary know how to do it
C.Only Mary knows how to do it
D.Mary knows only how to do it
答案及解析： C