The teacher,()whether anyone would come to help him, decided to prepare for the experiment by himself.
A.正确答案Anot knowing
B.not to know
C.knowing not
D.to have not know
The teacher,()whether anyone would come to help him, decided to prepare for the experiment by himself.
The teacher,()whether anyone would come to help him, decided to prepare for the experiment by himself.
A.正确答案Anot knowing
B.not to know
C.knowing not
D.to have not know