He asked me whether my brother ________ (fly) to Beijing.
had flown
暂无解析
Don’ttrusteverything________youhavereadinthenewspapers.
Thereply,whenitfinallycame,was________thenegative.
Willyousendus_____returnmailpamphletsandpricelist____yourexports?
By"languageacquisitionisprimarilytheacquistionofthegrammaticalsystemoflanguage",linguistsmeanthat______.
________youhadbeenhere,wewouldn’thavehadsomuchtroublethen.
