4.__________isthesecondlargestcountrywhichhasmoreHIVinfectionallovertheworld.

4.Thedoctororderedthatshe——stayinbedforafewdays。

动词order，suggest（建议），advise，demand等后宾语从句谓语动词用should do，should还可省略。

4.Themorefamiliaryoubecomewithyournewsurroundings,_______yourfeelingsofhomesicknesswillfade.

18.Hejust_______whenheheardthatjoke!

18.Ifyouwantapackagetour,pleasecontacta________inadvance.

4.WheredoesJohnworknow?

Directions:Thereare20incompletesentencesordialoguesinthispart,choosethebestanswertocompletethem.(补全句子，问题或对话)18.Weshould_______asimplelifeincollege.

Directions:Thereare20incompletesentencesordialoguesinthispart,choosethebestanswertocompletethem.(补全句子，问题或对话)18.SorryIcannot________myselfclearly.

Directions:Choosethebestanswertocompletethesentences,questionsordialogues.ThenmarkthecorrespondingletteronAnswerSheet.18.Ifyouwantapackagetour,pleasecontacta________inadvance.

4.Whataretheymainlytalkingabout?

在pH=5的六次甲基四胺缓冲溶液中,用0.02000mol/L的EDTA滴定同浓度的Pb2+,化学计量点时,pY是[pH=5时,lgaY(H)=6.4,lgK(PbY)=18.0]

在pH=5.0的乙酸缓冲溶液中，用0.002mol/L的EDTA滴定同浓度的Pb2+。已知lgKPbY=18.0，lgaY(H)=6.6，lgaPb(Ac)4=2.0，在化学计量点时，溶液中pPb’值应为（）

以下哪种客户信用额度设定方法是以客户最大负债能力为最大限额的基础上进行修订的计算方法。

18世纪60年代~19世纪末，在欧美流行的复古主义思潮，是指下列哪些思潮？Ⅰ.古典主义Ⅱ.浪漫主义Ⅲ.启蒙主义Ⅳ.折衷主义

以下程序运行后的输出结果是（）intmain(){intx=4,y=7;x-=y;y+=x;printf("%d%d\n",x,y);return0;}