单选题
[2009.01]He insured his car_______he had an accident.
A.unless
B.if
C.since
D.in case
正确答案:D
答案解析:本题考查连词词义区分。句意:他给自己的汽车投了保,以防万一遇到交通事故。A否则,要不然;B如果;C自从,由于;D以防万一,以免。