The teacher is satisfied with _ the students have done in the experiments A.that B all what C which D all that

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Theteacherissatisfiedwith_thestudentshavedoneintheexperimentsA.thatBallwhatCwhichDallthatTheteacheri

The teacher is satisfied with _ the students have done in the experiments A.that B all what C which D all that
The teacher is satisfied with _ the students have done in the experiments A.that B all what C which D all that

The teacher is satisfied with _ the students have done in the experiments A.that B all what C which D all that
D,with 后面加名词,后面的是个复合从句,就是这样吧!

what

what.此处缺少宾语,what引导后面宾语从句