They had to wait _____ the dog _____ out
问题:
They had to wait _____ the dog _____ out of the room. [ ]
A. for; come
B. for; to come
C. at; to come
D. at; coming
They had to wait _____ the dog _____ out of the room. [ ]
A. for; come
B. for; to come
C. at; to come
D. at; coming