问题标题：
1.Thisbrandofhandbagis___.AtwiceasexpensiveasthatoneBtwiceexpensivethanthatoneCastwiceexpensiveasthatone2.Aperformance___bystudentsinourinsitutetonight.AistoputonBistobeputonCwastobeputonDistobeputted
问题描述：
1.Thisbrandofhandbagis___.
AtwiceasexpensiveasthatoneBtwiceexpensivethanthatoneCastwiceexpensiveasthatone
2.Aperformance___bystudentsinourinsitutetonight.
AistoputonBistobeputonCwastobeputonDistobeputtedon
3.____isestimatedthatthecomputercompanywillhaveanotherharvestyear.
AThisBThatCWhatDIt
管庆华回答：
ABD
1.倍数表达：倍数+as+adj+as.
2.betodo(此题为被动）表示按照计划,安排将要发生.
3.Itisestimated/said/believed/considered/reported/predictedthat.这是一个it做形式主语的常见搭配,后面的句子就是it代替的内容.
胡斌强回答：
第一题B为什么不行
管庆华回答：
哦，另外2中倍数表达是：倍数+比较级+than....B选项应为twicemoreexpensivethan....还有一种用名词为：倍数+the+size/length/width/height/.....等+ofsth.
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