Try on vs. rely on

[EL]

Business Idiom in English, Intermediate level

ESL/EFL Test #63 "How to agree", question 2

You can ......... on me for your support.

(a) show
(b) rely
(c) try
(d) test

Business Idiom in English, Intermediate level

ESL/EFL Test #63 "How to agree", answer 2

You can rely on me for your support.

Correct answer: (b) rely
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WHY NOT TRY?

[Mister Micawber]

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On does not collocate with try in the meaning of this sentence, EL.

Try on = put on (a garment) in order to see whether it fits and looks nice.

Rely on = count on, depend on.
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Native English teacher at Mister Micawber's