Staring vs. spying

[Rinaldo]

Test No. incompl/inter-47 "Speaking 4 (The Broadcast)", question 5

It really is quite uncomfortable up here and there's a policeman ......... at me, which I don't like.

(a) spying
(b) guiding
(c) staring
(d) starring

Test No. incompl/inter-47 "Speaking 4 (The Broadcast)", answer 5

It really is quite uncomfortable up here and there's a policeman staring at me, which I don't like.

Correct answer: (c) staring

Your answer was: incorrect
It really is quite uncomfortable up here and there's a policeman spying at me, which I don't like.
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Hello! Can you tell me why using spying isn't properly.

[Alan]

Hi,

If you used spying, it would have to be : Spying ON me.

Alan
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English as a Second Language
You can read my ESL story Subjunctive