()1.Couldyouhelpme，please?A.OK.

()2.Thanksalot.B.You'rewelcome.

()3.Let'sputthebooksinthebox.C.It'sMonday.

()4.Canyoucarryit?D.No，it'sfull.

()5.Who'sondutytoday?E.lam.

()6.Isitempty?F.No，it'slight.

()7.Whatdayisittoday?G.Certainly.

()8.Isthatbagheavy?H.No.LiLeiisn'there..

()9.Areweallheretoday?I.No，thanks.

()10.Letmehelpyou.J.Yes，Ican.

灰沼狸生活在南非，营集群生活。一些个体在群中其它个体取食时，占据高处放哨。放哨者通常第一个发现接近的捕食者，并且发出告警声后，迅速到达安全的地方。研究者做了如下实验：据上述现象及实验，无法推断出：

()It'snineo'clock.Imust______.

()1.Don'tbelateagain.A.Anewwatch.

()2.MayIhaveacupoftea?B.Me，too.

()3.Iliketheredfan.C.Isee.

()4.What'sthatonthedesk?D.Sure.

()5.Where'sDad?E.Perhapshe'sinthestudy.

()6.Shallwegotothezoobybike?F.It'sBob's，Ithink..

()7.Whosekiteisthis?G.Goodidea.

()8.CanIhavealookatyourdress?H.Yes.Hereyouare.

He______anyauntsoruncles