Question

Every room in the house________ entered, and $10 in notes and a gold watch were missing.

A. was
B. had been
C. has been
D. have been
答案是B, 为什么选B呀？

Answer 1

had been 过去完成时的, 其实就是have / has been 的过去式，用于表达相对于一个过去的时间之前完成的状态。
这句话强调的是房间曾经被进入的状态，这个状态发生在过去。所以后面才会用were
整句意思：这幢房子的每个房间都被闯入了，十块钱和一块金表不见了。

Answer 2

B