You drive me up the wall?

[srimathi]

Test No. incompl/elem-14 "Computers", question 3

Do you mean it drives you up the .........?

(a) wall
(b) ceiling
(c) floor
(d) roof

Test No. incompl/elem-14 "Computers", answer 3

Do you mean it drives you up the wall?

Correct answer: (a) wall

Your answer was: incorrect
Do you mean it drives you up the roof?
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I don't understand why it should be wall for the following question.

"Do you mean it drives you up the .........?"

[Torsten]

To drive sb. up the wall is a set phrase which means to make sb. crazy.
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