1. It is difficult to learn Japanese.
2. We were delighted to get your letter yesterday.
3. It isn't easy to answer these questions.
4. Your writing is difficult to read.
5. It is impossible to midustand his theory. ( mà hình như làm j có từ midustand ah?)
6. They are ready to start now.
CHÚC HỌC TỐT!!!!!!