question responses

[Besarta]

hello,my coaches

I've got some phreases that i didn't understand and i would be very grateful if you could help.Here they go:
what does double-glazing mean?

The second one:
Mike: 'He offered me a 50% discount. What should I do?'
Jane: '.........'

(a) Hold his hand down.
(b) Bite his hand down.
(c) Hold your hand in.
(d) Bite his hand off.

What this sentences mean,cause i don't understand non of them.

And this last one: 'I wonder what she'll get up to next.'

Thank you in advance

[Beeesneees]

Double glazing: A two-pane window and door glass system, designed to minimise external noise and internal temperature loss.

If he offered 50% discount that means he offered it for half price (50% = 50 out of 100; half of 100). In that case the correct idiom would be (d).

I wonder what she'll get up to next = I wonder what she'll do next.
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Cheers m' dears!

[Besarta]

thank you a million