1) Books
( write) in different countries. 2) Look! The footballmatch ( play) on the stadium. 3) A helicopter (invent)by Sykorsky in Russia in 1939.4) While Sykorsky wasexperimenting with his apparatus, he (watch) by hisassistants 5) A lot of natural catastrophes (happen) inthe 21st century. 6) The first ballpoint pen was madein 1940.though it (invent) by L. Biro in 1905. 7) Soonmobile telephones (use) by all the people in theworld. 8) By July my exams (pass). Помогите пожалуйста, сделайте правильно