1. you can’t visit the USA unless you have a visa

=> If you don't have a visa, you can't visit the USA.

2. can i borrow your typewriter, janet”? Asked peter

=> Peter asked if he could borrow Janet's typewriter.

3. She started working as a secretary five years ago

=> She has worked as a secretary for five years.

4. She knows a lot more about it than i do

=> I don't know about it as much as she does.

5.My French friend finds driving on the left difficult ( used to)

=> My French friend isn't used to driving on the left.

6. They think the owner of the house is abroad (thought)

=> The owner of the house is thought to be abroad.

7. the children couldn’t go swimming because the sea was rough (too)

=> The sea was too rough for the children to go swimming.

1. If you don't have a visa, you can't visit the USA.

2. Peter asked if he could borrow Janet's typewriter.

3. She has worked as a secretary for five years.

4. I don't know about it as much as she does.

5. My French friend isn't used to driving on the left.

6. The owner of the house is thought to be abroad.

7. The sea was too rough for the children to go swimming.