问题
选择题
__ many times, but she still didn't know how to do it.
A．She was taught
B．Having taught
C．Having been taught
D．She has taught
答案
答案：A
因为有but连接所以前后两个必须是完整的句子。
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__ many times, but she still didn't know how to do it.
A．She was taught
B．Having taught
C．Having been taught
D．She has taught
答案：A
因为有but连接所以前后两个必须是完整的句子。