I have not decided_______to join you yet.A.if B.what C.which D.whetherI have not decided_______to join you yet.A.if B.what C.which D.whether详尽讲解

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I have not decided_______to join you yet.A.if B.what C.which D.whetherI have not decided_______to join you yet.A.if B.what C.which D.whether详尽讲解

I have not decided_______to join you yet.A.if B.what C.which D.whetherI have not decided_______to join you yet.A.if B.what C.which D.whether详尽讲解
I have not decided_______to join you yet.A.if B.what C.which D.whether
I have not decided_______to join you yet.
A.if B.what C.which D.whether
详尽讲解

I have not decided_______to join you yet.A.if B.what C.which D.whetherI have not decided_______to join you yet.A.if B.what C.which D.whether详尽讲解
选D 我还没决定是否要加入你们.
首先,从意思上讲就可以排除B和C.
选A的话就应该是:I have not decided if I should/will join you.
这句话还可以用when,意思就是 我还没决定什么时候加入你们.

D
if 后 不可以跟不定式 故用whether

D. whether与yet连用,译为“是否”,“我还没决定是否要加入你们”。四个选项里只有if和whether可以作“是否”用,但是if不能与yet、or not连用,所以选择whether~~~

D
我还没决定是否加入你 
  

D