Przeczytaj tekst. Wybierz poprawne uzupełnienia luk 12.1.-12.4. Zakreśl jedną z liter: A, B albo C.

Wearing sunglasses is necessary not only to look cool but also to protect your eyes 12.1._____ the harmful rays of the sun. Sunglasses 12.2. _____ lenses that filter out the harmful rays and allow you to see clearly. On no account should you look directly at the sun even if you wear sunglasses. It can 12.3._____ damage to the retina. 12.4._____ your best to take care of your eyes, they are one of the most important parts of your body.

12.1. A. for  B. against  C. on
12.2. A. has  B. have  C. are having
12.3. A. cause  B. causes  C. causing
12.4. A. Doing  B. To do  C. Do