a special drink vs. a specialised drink

[Foka]

English Language Tests, Intermediate level

ESL/EFL Test #86 "Simple Present (3)", question 8

And he mixes her a ......... drink to protect her from a possible cold.

(a) unusual
(b) speciality
(c) specialised
(d) special

English Language Tests, Intermediate level

ESL/EFL Test #86 "Simple Present (3)", answer 8

And he mixes her a special drink to protect her from a possible cold.

Correct answer: (d) special
_________________________

Why is not "specialised drink"?

Foka

[Wly]

Hi,everybody
Why we can't use unusual in this sentence?
Is unusual same with special?

[Beeesneees]

unusual = different
special = different from the usual

In this instance 'unusual' could be used BUT it would require the article 'an' before it for it to be correct.
This test question uses the article 'a', so only 'special' will work.
_________________
Cheers m' dears!

[Wly]

Hi, Beeesneees
Your answer is clear. Thank you.