Вставьте модальные глаголы can, may, must:You .... check your account carefully. You .......

Question

Вставьте модальные глаголы can, may, must:
You .... check your account carefully.
You .... answer this letter immediately.
You ... .keep the documents more than 2 weeks.
… you lend me $10?
Leonardo Da Vinci was a student in Florence He ....draw, design buildings and write music.
You .... (not) park your car here.
This problem .... be solved.
Many different commodities .... serve as money.

… we translate the Protocol into Russian?
He .... be speaking on the phone

Answer 1

You must check your account carefully.
You must answer this letter immediately.
You may keep the documents more than 2 weeks. 
Can you lend me $10?
Leonardo Da Vinci was a student in Florence He may draw, design buildings and write music.
You can (not) park your car here.
This problem must be solved.
Many different commodities can serve as money.

Can we translate the Protocol into Russian?
He must be speaking on the phone