It(This) is/was the first(second,third……) time that sb.have/had done sth.从句中的时态为什么必须用完成时?

This is the reason ____I was telling you about it. This is the island ----was bought by a millionaire A it B that C this D/ wet,today,is,it,was,but,yesterday,wetter,it 急和 shop,in,largest,the,this,the,is,dress who was ——broke the window A it this Bit that c this is d that it 1.Is this museum____they visit yesterday?2.Is this the museum____they visit yesterday?3.Is this museum____they stayed yesterday?4.Is this the museum____they stayed yesterday?5.Is this the museum ____you visited yesterday beautiful?6.It was the museum 关于定语从句几道题is thsi museum ( )they visited yesterday?is this the museum( )they visited yesterday?is this museum ( )they stayed yesterday?is this the museum ( )they visited yesterday?is this museum( )you visited yesterday?it was the mus This picture is old.We can still see it was drawn in ___centuryA sixteenB the sixteenC sixteenthD the sixteenth look at this!what is this?It is the word it was the third time i was late this week.it was 后面什么用法? When i woke up this morning,i found_______ A.it is raining B.it was raining C.the sky was raining为什么C不可以选 When i woke up this morning,i found_______ A.it is raining B.it was raining C.the sky was raining为什么选C不对 it is the house (　　)he was born It was not your fault.Is this correct?这不是你的错.Please provide a better answer.1）It was not your fault.What is the different between (1) and (2)。1）It was not your fault.--Is this correct?2）It is not your fault.--Is this correct? This is the reason ____I did it. 英语翻译this is 和 it was 有区别么 this small town has changed a lot and it is not the town__it was years ago 这是哪儿 ---The new teacher is very strict.--- I was told so.为什么用so不用it或this 英语翻译It is planned to store this glass,which the nuclear waste was turned into,in deep underground mines.