Question

4. They made up their mind that they    a new house once Larry changed

jobs.

A. bought       B.   would buy

C. have bought      D.  had bought

Answer 1

4.    B考查动词的时态。句意：他们下定决心一旦拉里换了工作他们就会买一所新房子。that引导的从句的时态要与主句的时态保持一致，主句用的是一般过去时，再由语境判断从句句意用过去将来时。故选B。