was "he" missed there?

[Leonidi]

English Idioms and Expressions, Advanced Level

ESL/EFL Test #16 "Expressions with Top", question 2

When the accident happened all he could think about was attracting attention and started calling out at the top of his voice.

(a) as quickly as possible
(b) as freely as possible
(c) as clearly as possible
(d) as loudly as possible

English Idioms and Expressions, Advanced Level

ESL/EFL Test #16 "Expressions with Top", answer 2

When the accident happened all he could think about was attracting attention and started calling out as loudly as possible.

Correct answer: (d) as loudly as possible

Your answer was: correct
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was "he" missed there?
(When the accident happened all he could think about was attracting attention and HE started calling out as loudly as possible)

Leonidi

[Conchita]

After waiting in vain for someone else to have a go at your question (I'm not the test author, after all), I'll give you my take on it, for what it's worth.

Like you, I would also insert the pronoun 'he' at the beginning of the last clause.

[Mister Micawber]

.
I'm not either, so I didn't.
.
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Native English teacher at Mister Micawber's

[Tom]

[Conchita]

[Tom]