Turn in vs. turn on

[Repju]

English Language Tests, Intermediate level

ESL/EFL Test #199 "Phrasal Verbs (T)", question 7

The teacher asked her students to ......... the assignments by Friday at noon.

(a) turn on
(b) turn in
(c) turn with

English Language Tests, Intermediate level

ESL/EFL Test #199 "Phrasal Verbs (T)", answer 7

The teacher asked her students to turn in the assignments by Friday at noon.

Correct answer: (b) turn in

Your answer was: incorrect
The teacher asked her students to turn on the assignments by Friday at noon.
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I don't know the reason why people use ''turn in" not others.

Repju

[Mister Micawber]

.
A and B are idiomatic phrasal verbs. You must learn the meanings of the phrase as a unit:

turn on:

1--produce suddenly or automatically (Example: "Turn on the charm")
2-- become hostile towards
3-- cause to operate by flipping a switch (Example: "Turn on the stereo")
4-- get high, stoned, or drugged
5-- cause to be agitated, excited, or roused
6-- stimulate sexually
7-- be contingent on

turn in:

1-- make an entrance by turning from a road (Example: "Turn in after you see the gate")
2-- go to bed in order to sleep (Example: "I usually turn in at midnight")
3-- carry out (performances)
4-- to surrender someone or something to another
.
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Native English teacher at Mister Micawber's