问题补充：
The dying old man opened his mouth as ifsomething.
A. to say
B. saying
C. to have said
D. was saying
答案：
(答案→)A. to say
B. saying
C. to have said
D. was saying
解析：状语从句的省略形式，根据句意可知，其完整形式为：as if he wanted to say ...
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