— It sounds like something is wrong with the car’s engine.— we’d better have it repaired

问题补充：

— It sounds like something is wrong with the car’s engine.

—, we’d better have it repaired immediately.

A. Where possible

B. If not

C. But for that

D. If so

答案：

A. Where possible

B. If not

C. But for that

(答案→)D. If so

解析：省略句辨析。A在可能的地方；B如果不；C要不是…；D如果这样；句意：—听起来好像汽车的发动机出了问题。—如果这样，我们最好还是立刻修理一下。根据句意说明D正确。