Nauka i technika - STR8 to E8

Help

A lab is a place _______ (gdzie musisz) be very careful.

where you must / where you have to

Excuse me, (czy mógłbyś zainstalować) ________ this programme on my laptop?

could you install

I'm sorry, we (nie sprzedajemy) _________ webcams in our shop.

don't sell

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