Question

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

Answer 1

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。