来自陆文彦的问题
()6.—Whataretheseyounggirlsdoing?—Theyaretraining____volunteers____theSpringSportsMeeting.A.tobe;toB.as;forC.for;forD.as;to
()6.—Whataretheseyounggirlsdoing?
—Theyaretraining____volunteers____theSpringSportsMeeting.
A.tobe;to B.as;for C.for;for D.as;to
