问题补充：
The man insisted that he innocent.
A. was
B. should be
C. be
D. were
答案：
(答案→)A. was
B. should be
C. be
D. were
解析：考查动词的时态。Insist当坚持说，坚持认为讲时，用陈述语气；当坚决要求讲时，要用(should)+do的虚拟语气。根据句子，应是这个男人坚持说他是无辜的。所以用陈述语气，排除B,D;主句用的是一般过去时态，从句也用一般过去式，所以选A。
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