Didn't hear what you said

[MAYLEUNG]

Test No. incompl/elem-4 "Listen/Hear", question 1

I'm terribly sorry but I ......... what you said just now and I wonder if you could repeat it.

(a) wasn't listen to
(b) wasn't hearing
(c) didn't hear
(d) didn't hearing

Test No. incompl/elem-4 "Listen/Hear", answer 1

I'm terribly sorry but I didn't hear what you said just now and I wonder if you could repeat it.

Correct answer: (c) didn't hear

Your answer was: incorrect
I'm terribly sorry but I didn't hearing what you said just now and I wonder if you could repeat it.
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HOW TO USE LISTEN & HEAR?

[Alan]

Putting it simply listen is to use your ears to concentrate on a particular sound/noise. YOU LISTEN TO MUSIC. Hear is using one of the 5 senses like seeing touching smelling tasting. It is an involuntary reaction YOU HEAR A NOISE.
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English as a Second Language
You can read my ESL story A New Season