单选题
30.
______ his telephone number, she didn't know how to get in touch with him.
A、
Having forgotten
B、
To have forgotten
C、
Forgetting
D、
To forget
【正确答案】
A
【答案解析】
[考点] 非谓语动词
forget与其逻辑主语she之间为主谓关系，应用现在分词。且forget这一动作发生在主句动作发生之前，所以应用现在分词的完成式。故选A。
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