Question

voice change:-- he kept me weating
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Answer 1

Answer:

I was kept waiting by him

Explanation:

Here,

he is subject  

Kept becomes (was kept) in passive. waiting will be remained same as it.

"Me" is object.

Now, change subject to object's place and object to subject place.

so it becomes : I was kept waiting by him

Answer 2

Explanation:

passive voice - I was kept waiting