Chia dạng đúng của từ trong hộp để hoàn thành câu

----- Nội dung ảnh -----
1. The __________ (Part of speech):
2. Nobody could find the __________ difficult Maths problems.
3. Even though they had financial difficulties, they were __________ married.
4. I feel very __________ (Part of speech):
5. I think I'll have __________.

- SLEEP
- HAPPY
- SOLVE
- ROB