It sounds like something is wrong with the car's engine. ，we'd better take it to the garage immediately.(2011·江苏，33)
A. Otherwise
B. If not
C. But for that
D. If so
网友回答
A. Otherwise
B. If not
C. But for that
(答案→)D. If so
解析：句意：汽车的发动机听上去好像出了问题。如果这样的话，我们最好马上把它弄到修理厂。if so假如这样的话，符合题意，所以选D。otherwise否则；if not如果不；but for that要不是那样的话，均不符合题意。