6.It_______this way A .is had to do B .is had to be done C .

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6.It_______this way A .is had to do B .is had to be done C .had to be done D .has to do
RT.选什么?thanks
请说明原因

C过去完成时被动态.
再问：过去完成时的被动语态是had+been+p.p.啊
再答：是的，had been+过去分词
再问：那答案c里哪有been？
再答：不好意思，这个句子是have to be done的形式，不得不做，和完成时没关系。have to是必须，不得不的意思，be done是过去式。
再问：哦谢谢，那前边为什么不能+is？
再答： It had tobe done.不得不做这件事，had to已经作为情态动词了，前面不能再加is了。

6.It_______this way A .is had to do B .is had to be done C . It ____ this way.A.used to do B.used to be done C.is used to What should ____ must ____.A do,do B be done,be done C to be He ___appeared to be always about ___I had done A,what B,tha He had no way to find a room to_____.A live in B live C livi You will ask for what you A will do B have done C had done D what （）is tom want to be?A,do B,is C,does what is to be done? 帮忙用was/were doing .when ; be about to do.when;had just done. had juest done..when ,were/was doing..when,be about to do .. Alice had nothing____________.A.do B.to do C.doing D.did Which is ( ) your new house?A the way to B the way C the way