Present perfect vs past simple

• English
• Secondary Education
• Age 12

Today, I ......................... very much! I am so tired.

1. studied
2. have studied
3. study
4. studying

When I was a child I ................ in the U.S.A.

1. have lived
2. am living
3. lived
4. live

Look! The cat .................... the door.

1. scratched
2. just scratched
3. scratch
4. has just scratched

I .................... to many European countries.

1. been
2. went
3. have been
4. gone

I .................. not so good in Maths in high schools.

1. have been
2. was
3. am
4. be

Sara ....................... many important people in her life.

1. met
2. meeting
3. meet
4. has met

I have worked at the British Institutes ......... 15 years

1. for
2. since

I have known Simona ............ we were at University.

1. since
2. for