Scientists made a lot of interesting explorations about the universe ( find mistakes . 2-I have been reading about famous women ( who / which ) I have found very interesting
3-That was written in 1946, since ( which / when / that ) the education system has undergone great changes
4-( However / Although / Despite / In spit ) repeated assurance that the product is safe, many people have stopped buying it
5-( While / When / After / on ) her visit to the zoo, she was exhausted

1- made........did.....
2- which
3- that
4- Despite
5- on

1which
2that
3despite
4while
5

Scientists made a lot of interesting explorations to / forthe universe ( find mistakes .
2-I have been reading about famous women/ which ) I have found very interesting
تعود على الحدث نفسه
3-That was written in 1946, since ( which ) the education system has undergone great changes
which and whom فقط ممكن أن تسبقا بحرف جر وsince هنا حرف جر
4-( / Despite ) repeated assurance that the product is safe, many people have stopped buying it
5-( / After her visit to the zoo, she was exhausted
الإنهاك جاء بعد الرحلة وليس أثنائها

sorry explorations to (only to)

1- about - in
2- which
3- that
4- despite
5- after

I agree with you Mr. Sherif
1-make exploration for
2- which
3-which
4-despite
5-after

1- made....explorations of.....
5- after

1- about -à of - into
2- which
3- since that (time)
4- Despite
5- After

Scientists made a lot of interesting explorations about the universe.
(discoveries ) .
2-I have been reading about famous women ( who / which ) I have found very interesting
which

3-That was written in 1946, since ( which / when / that ) the education system has undergone great changes
since which ( refering to the event )
4-( However / Although / Despite / In spit ) repeated assurance that the product is safe, many people have stopped buying it
despite
5-( While / When / After / on ) her visit to the zoo, she was exhausted
after

مستر علاء عبدو هو الوحيد الصحيح

answers
1- made - did
لان ما يتم فى الكون explorations و ليس discoveries
و حرف الجر ليس به اى خطأ
2- which
لان ما بعدها يعود على الجملة كاملة
3- that
لانها تشير الى الحدث الموجود
4- Despite
لان ما بعدها ليست جملة و انما فاعل اتصل بجملة ضمير وصل
5- after
لان التعب جاء بعد الزيارة
Mr Ali Sobhi
زهراء حلوان الثانوية بنين