A)choose the right variant1.could you tell me what impact...(do cars have on the environment/cars have on the environment)?2.please,explain how...(technology has changed the world/has technology changed the world).3.i don't kno...

A)choose the right variant 1.could you tell me what impact...(do cars have on the environment/cars have on the environment)? 2.please,explain how...(technology has changed the world/has technology changed the world). 3.i don't know when...(computers Were invented/were computers invented). 4.have you any idea why...(some people are crazy/are some people crazy)about new gadgets. 5. I wonder...(if/that)computers will live far into the 21st century. 6.please tell me what new gadget...(do you fell like/you feel like)buying. 7.do you happen to know by whom...(the first space rocket was constructed/was the first space rocket constructed)?