【题目】Cathy had quit her job when her son was born _______ she could stay home and raise her family.
A.now that
B.as if
C.only if
D.so that

【答案】D
【解析】句意：当Cathy的儿子出生的时候，她就放弃了自己的工作，以便呆在家里照顾家人。A.now that”既然“；B.as if”好像“；C.only if”只要“；D.so that”以便“。根据句意故选D。