A.
1. He said that the USA borders on Canada and Mexico. (general truth - don't change the tense)
2. He inquire what had he told Mike about his journey.
3. He wondered had his sister finished school two years before.
4. He said that they would take on exam the followin summer.
5. He replied they were weeding the garden at that moment.
6. He wanted to know who could help them to mow the lawn.
7. He told he didn't know what you were talking about.
8. He replied the English people selted in the New World in 1620 (historical fact - don't change the tense)
9. He asked was the rose the symbol of England.

B.
1. He said the flag of the USA is called stars and stripes. (general truth - don't change the tense)
2. He wanted to know where had the boy been all that time.
3. He replied they were playing footbool un the yard at that time.
4. He inquire were you often late for school.
5. He asked why couldn't she leave home earlier.
6. He asked had their granne stayed with them the weekend before.
7. He admitted that W.Shakespeare was born in Stratford-upon Avon.
8. He wanted to know how would the get to the top of the mountain.
9. He said that Ben Nevis is the highest mountain in Scotland. ( general truth - tense isn't change)