—______ that he managed to get the book?
问题:
—______ that he managed to get the book?
— Oh, his sister helped him.
A.Where was it
B.What was it
C.How was it
D.Why was it
—______ that he managed to get the book?
— Oh, his sister helped him.
A.Where was it
B.What was it
C.How was it
D.Why was it