1、Itten years since he left Shanghai.A.were B.is C.had been D.will be2、Shesick for two days before Thursday.A.had been B.was C.has been D.is being 3、As a boy,James Watt,who invented the steam engine later,questions.A.always asks B.h

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1、It____ten years since he left Shanghai.A.were B.is C.had been D.will be2、She____sick for two days before Thursday.A.had been B.was C.has been D.is being 3、As a boy,James Watt,who invented the steam engine later,____questions.A.always asks B.h
1、It____ten years since he left Shanghai.
A.were B.is C.had been D.will be
2、She____sick for two days before Thursday.
A.had been B.was C.has been D.is being
3、As a boy,James Watt,who invented the steam engine later,____
questions.
A.always asks B.has always asked
C.was always asking D.had always asked

1、It____ten years since he left Shanghai.A.were B.is C.had been D.will be2、She____sick for two days before Thursday.A.had been B.was C.has been D.is being 3、As a boy,James Watt,who invented the steam engine later,____questions.A.always asks B.h
B
A,(选C绝对的错)
C
告诉你原因吧,不要弄错了.
第一个,可以用排除法
A不对了,since 加过去的时间是现在完成时的标志.
C也不对,因为没有语境可以看出来是过去的过去
D错的太远了,不用考虑了吧
第二个,为什么不选C呢?
因为星期四之前,说明了是比星期四更早的时间里她病了几天,是过去的过去,用过去完成时
第三个,A和B都是现在的时态,肯定不对,D是过去完成时,没有一个什么标志,说明是过去的过去,所以不选D,选C.
be always doing sth 带有语气的强调,说明他总是怎么样.

c c a

BAC

我的答案和一楼相同。

C,C,D

BBC
顺便与Tim311商榷:第1题的主语是it,谓语用is是对的(只有主谓一致的说法,却没有系表一致的说法)；第2题不要看到before Thursday就以为有“过去的过去”，过去完成时的最重要概念是“追溯”过去的过去，而原句是直接讲过去的情况，并没有“追溯”的意思。...

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BBC
顺便与Tim311商榷:第1题的主语是it,谓语用is是对的(只有主谓一致的说法,却没有系表一致的说法)；第2题不要看到before Thursday就以为有“过去的过去”，过去完成时的最重要概念是“追溯”过去的过去，而原句是直接讲过去的情况，并没有“追溯”的意思。

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It____ten years since I saw him last time.A has B was C had been D is It____ten years since his father died .A is Bwas Chad been Dwill be 为什么选a请具体一些 1、It____ten years since he left Shanghai.A.were B.is C.had been D.will be2、She____sick for two days before Thursday.A.had been B.was C.has been D.is being 3、As a boy,James Watt,who invented the steam engine later,____questions.A.always asks B.h SI si 句型转换：1.Si Yu taught herself English when she was five years old Si Yu ____ English ___ when 1mol晶体硅有几摩尔Si—Si? 1mol sic中si c个数si-c键 1mol晶体Si含几molSi-Si键 SI单位为1是什么意思 1mol的Si里有多少Si-Si键,1mol的SiO2里有多少Si-O键? 1mol Si中含有几摩尔Si-Si键为什么?结构图是怎样的? MOV AX,468AH MOV SI,1357H MOV [SI],AX MOV CL,4 SHR BYTE PTR[SI],CL SHL WORD PTR[SI],1 MOV AX,[SI] I haven't seen him in years.句中 seen him 连读成/si:nim/可以吗? 英语填空l do not know his 【a _____】maybe he si about 13 years old 晶体SI硅中为什么1MOL SI平均形成2MOL SI-SI?图上不是有很多SI-SI键吗?为什么1 mol Si假设它里面只有2个硅原子?而不是更多,这不是有很多 1、I discorvered that the most important requirement was ( ) English well .A sperk B to speak C say D to say2、It si five years ( ) the old man died .A that B when C since D for MOV AX,2000H MOW DS,AX MOC CL,4 MOV SI,2000H MOV AL,[SI+1] SI是多少?