Question

I had been looking for the book for two days _______ I found it at last. A． until B． when .

I had been looking for the book for two days _______ I found it at last. A． until B． when C． while D．before

Answer 1

D

试题分析：考查连词：A.  until直到，B.   when当…时候，C.    while当…时候，虽然，然而，D. before在…前面，…才…，因为前面是过去完成式，所以是发生在过去的动作前的动作，句意：在我最后找到它之前，我已经找了这本书两天了。或是：我找了这本书两天才找到。选D。