Steamboat Willie was "Mickey's screen debut"(Line 1, Para. ), which means that ______.A.i
Steamboat Willie was "Mickey's screen debut"(Line 1, Para. ), which means that ______.
A.it was the first time that Mickey appeared in films
B.this cartoon was a big success
C.it was the last time that Mickey appeared in films
D.Mickey was the leading role in this film