Complete the sentences with can. can't, will be able to, won't be able to,could couldn't

Конечно, я помогу! Давайте начнем. 1. Я \_\_\_\_\_\_ understand this difficult math problem if you explain it to me. 2. Tomorrow, I \_\_\_\_\_\_ go to the museum with my friends because I have a lot of homework to do. 3. Last year, I \_\_\_\_\_\_ swim, but this year I learned and now I love it. 4. We \_\_\_\_\_\_ finish the project on time if we work together efficiently. 5. I \_\_\_\_\_\_ believe I got an A on my history exam! 6. She said she \_\_\_\_\_\_ speak fluent Spanish after living in Madrid for a year. 7. I \_\_\_\_\_\_ go to the concert with you because I have plans already. Дайте мне знать, что вы думаете о предложенных завершениях предложений!