问题补充：
To her surprise, the life she had been looking forward to to be unpleasant.
A. prove
B. being proved
C. proving
D. proved
答案：
A. prove
B. being proved
C. proving
(答案→)D. proved
解析：考查时态。句意：让她吃惊的是，她一直盼望的生活被证明是并不幸福的。she had been looking forward to作定语修饰the life，根据语境可知本句描述的是过去的动作，故用过去时态，选D。
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