Prepositions: AT for time of day, ON for day

[charlies]

English Language Tests, Intermediate level

ESL/EFL Test #204 "Prepositions of Time and Date (2)", question 7

......... three weeks, I'm going on a camping trip. We're going to a really scenic spot.

(a) On
(b) In
(c) (none)

English Language Tests, Intermediate level

ESL/EFL Test #204 "Prepositions of Time and Date (2)", answer 7

In three weeks, I'm going on a camping trip. We're going to a really scenic spot.

Correct answer: (b) In

Your answer was: incorrect
On three weeks, I'm going on a camping trip. We're going to a really scenic spot.
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hello

what the preposition in fets in this sentence
can you give us an example
thank you

charlie

[Mister Micawber]

.
For expressions of relative future, we usually use at for time of day, on for day, and in for greater units:

At 7:00 / noon, I'm going camping.
On Tuesday /the weekend, I'm going camping.
In a week / month, I 'm going camping.

Does that answer your question?
.
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Native English teacher at Mister Micawber's