meaning of "Send up blind alleys"

[Katarina]

Test No. incompl/inter-29 "Who has done it?", question 2

The skill of course of the writing is how many times a reader can be sent up ......... alleys.

(a) short
(b) twisted
(c) blind
(d) long

Test No. incompl/inter-29 "Who has done it?", answer 2

The skill of course of the writing is how many times a reader can be sent up blind alleys.

Correct answer: (c) blind
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What does it mean sent blind up alleys?

Katarina

[Torsten]

A blind alley is a situation that is not effective or will not produce results. So, when send you readers up blind alleys you lead them astry.

TOEIC listening, talks: Radio commercial for energy efficient windows

[Mudium]

dear teacher
why can't we use twisted hear in this answer
jyo

[Torsten]

Because "a blind alley" is a fixed expression with an idiomatic meaning while "a twisted alley" is not.

TOEIC listening, photographs: Stepping out

[Thunu]

Dear Teachers

Can you translate this sentence more easily for me to understand? I dont really understand the meaning of this sentence?

Thank you

Thu
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Reach an agreement as ploughing, don't let argument happen at crops.

[Dthong]

Please explain me the meaning of astry. I didn't see it in the dictionary. Thanks

[Shyone]

[Kitosdad]

The skill of a good storyteller, is in getting the reader to feel certain they know what is happening, only to find out that they have been lead up a " blind alley " by skilled plot-weaving.

Pretty much like the guy who is haunting these Forums trying to sell insurance.

We haven't been led up any blind alleys by his pathetic tales.
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Keep it simple ... Keep it interesting.

[Watie]

What does ''trying to sell insurance' mean? Is it idiom?

Many Thanks..