______ he referred to in his article was unknown to the general reader. 
#73865
A
That
B
What
C
Whether
D
Where
推荐题目
--What did the teacher say to you just now?  ---She asked me ___.
#71704
A
if I hace finished my homework
B
if my homework had finished or not
C
whether or not had I finished my homework
D
whether I had finished my homework