Question

Fill in: must, mustn't, have/has to, don't have to.
1. You 1)........take a break every hour to give your eyes a rest and your body a stretch. You screen 2)...........be a close ti your eyes. There 3)..........be a distance of 45 to 60 cm between you and the screen.
The top of your screen 4)..........be at the same height as your eyes.
You 5).........buy a special chair, but it 6)........have a brackrest.

Answer 1

Ответ:

You must take a break every hour to give your eyes a rest and your body a stretch. You mustn't be too close to your eyes. There has to be a distance of 45 to 60 cm between you and the screen. The top of your screen has to be at the same height as your eyes. You don't have to buy a special chair, but it must have a backrest.

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