пожалуйста, помогите решить 4,5 задание по англ. языку! )

4.
1) Paper was invented by Chinese.
2) America was discovered by Columbus.
3) Penicillin was discovered by Fleming.
4) The Statue of Liberty was given to the American people by the French government.
5) Mona Lisa was painted by Leonardo da Vinchi.
6) The play "Mousetrap" was written by Agatha Christie.

5.
1) was 2) had worked  3) would leave 4) ... if she had ever been 5) would come

Не скажу, что 5е задание точно правильно, там подвохов много)) Но надеюсь, что чем-то помогу.