'as long as' vs 'when'

[seema]

English Language Tests, Intermediate level

ESL/EFL Test #142 "Time clauses: future tense examples", question 5

We'll find a hotel ......... we arrive in Jakarta.

(a) until
(b) while
(c) when
(d) as long as

English Language Tests, Intermediate level

ESL/EFL Test #142 "Time clauses: future tense examples", answer 5

We'll find a hotel when we arrive in Jakarta.

Correct answer: (c) when
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can we use "as long as"?

seema

[Mister Micawber]

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No-- it has no meaning in this sentence.
.
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Native English teacher at Mister Micawber's