What does this expression mean: 'mind you'? Thanks

[thinker]

Test No. incompl/inter-48 "Speaking 5 (The Wedding)", question 10

Mind you I was surprised because you see I find it quite ......... why on earth she didn't marry me.

(a) unbelievable
(b) unbelieving
(c) disbelief
(d) disbelieving

Test No. incompl/inter-48 "Speaking 5 (The Wedding)", answer 10

Mind you I was surprised because you see I find it quite disbelieving why on earth she didn't marry me.

Correct answer: (d) disbelieving

Hi! Tell me please! I don't understand.
Many thanks
Thinker

[Alan]

Hi Thinker,

The expression is used mainly in conversation when you are about to introduce a topic that you find a little unusual or surprising. So you could be talking about someone with other people and the others are all very critical and you start to speak and say: 'Mind you, you must agree that he works very hard.' In that way you are expressing a different opinion from what the others are expressing.

Alan
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English as a Second Language
You can read my ESL story Everything in the Garden is lovely

[thinker]

Hello Alan! Many thanks
Thinker

[Guest]