Idiom: to be along (to arrive)

[ElGatos]

English Idioms and Expressions, Elementary Level

ESL/EFL Test #8 "Preposition Exercises", question 7

You won't have to wait too long because another bus will be along soon.

(a) will drive
(b) will travel
(c) will arrive
(d) will turn

English Idioms and Expressions, Elementary Level

ESL/EFL Test #8 "Preposition Exercises", answer 7

You won't have to wait too long because another bus will arrive soon.

Correct answer: (c) will arrive
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explain for me please: Idiom: to be along (to arrive)

ElGatos

[Mister Micawber]

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To be along = to arrive.
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Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber

[Conchita]

Ever so succinct, MM!

As you must be aware by now, ElGatos, you've answered yourself in your question. Let me, however, just add that the phrasal verb 'come along' can also be used as equivalent of 'be along' in this sense.