______,Johnson didn't know how to begin.A.Not having made a speech beforeB.For he knew nothing about a speechC.He didn't know any speechD.Having not made any speech before

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______,Johnson didn't know how to begin.A.Not having made a speech beforeB.For he knew nothing about a speechC.He didn't know any speechD.Having not made any speech before

______,Johnson didn't know how to begin.A.Not having made a speech beforeB.For he knew nothing about a speechC.He didn't know any speechD.Having not made any speech before
______,Johnson didn't know how to begin.
A.Not having made a speech before
B.For he knew nothing about a speech
C.He didn't know any speech
D.Having not made any speech before

______,Johnson didn't know how to begin.A.Not having made a speech beforeB.For he knew nothing about a speechC.He didn't know any speechD.Having not made any speech before
选D.
have是助动词,所以not要放在have后面.
这是考察非谓语动词的用法.
having not made any speech before.过去没有坐过演讲.

答案是A
非谓语动词的否定式:
not to do
not doing
not done
Not having made a speech before原因状语
=Because Johnson had not made a speech before,