问题
选择题
She was moving out of her old apartment _______ she suddenly realized that the key to the new apartment wasn’t on her.
A．until
B．once
C．when
D．as if
答案
答案：C
连词辨析。 A.直到……B.一旦 C. 当……时 D.好似。句意：当她意识到她的新公寓的钥匙没有带在身上时，她正在走出她的旧公寓。选C。