Tóm tắt giúp mình luôn ạ:

Một hòn đá có khối lượng 5 kg, bay với vận tốc 72 km/h. Động lượng của hòn đá là:

the child ________ his parents since last moth

A. hasn't met

B. didn't meet

C. wasn't met

D. wasn't meeting

morden technology has entered your life and you should try to _____ advantage of it.

A. have

B. take

C. do

D. catch

some people think that electronics are bad ______ your eyes, and radiation from them could harm your body.

A. on

B. to

C. for

D. in