They failed to pass the exam last time; I regretted______.A、to be not able to he

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问题 They failed to pass the exam last time; I regretted______.

选项 A、to be not able to help
B、being unable to help
C、being not able to helping
D、not be able to help

答案 B

解析

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Johnis______hardworkingthanhissister,buthefailedintheexam.（1998年考试真题）