Bằng kiến thức đã học về hệ bài tiết, em hãy trả lời câu hỏi sau: Bạn Mai bị đau vùng thắt lưng, đi tiểu buốt và ra máu có thể bị bệnh gì? Em hãy nêu nguyên nhân và cách phòng tránh bệnh đó.

Giúp em với mọi người

Exercise 2:Complete the sentences with the missing modal verbs.
(must, mustn't, don't have to, doesn't have to, can, can't, should, shouldn't, will, won't, may, used to)
1. Maria is six years old. She---------- swim but she---------- drive a car
2. 'I have a toothache'- You ----------- go tothe dentist
3. This dog is bad. You---------play with it.
4.----------- i borrow your book?
5. I---------- take my children to the kindergarten every morning.
6. Jane---------- put on pullover. It's rather hot outside.
7. I ---------lend you my course book because i need it now
8. She thinks she------------- find a better job one day.
9. I hope it ------------ rain tomorrow.
10. You.-------  smoke here. It's forbidden.
11. You --------- brush your teeth at least twice a day
12. The ice is too thin to skate on. It------------- break suddenly
13. Anna has just lost her purse so she---------------- buy a ticket for
the evening concert.
14. Lisa ----------work on Sunday, so she usually gets up late.
15. I----------- -- play hide-and-seek when I was a child.
16. I promise l ------ tidy my room in the afternoon.
17. It---------- rain. Don't forget your umbrella.
18. I----smoke but I gave up.
19. You drive too fast. You ------------ have  an accident one day!
of the computer
20.I ----------_leave now. My dad is waiting for me.
21. ---- - you help me, please?
22. You -------------- spend so many hours in front of the computer.
23. You ------------ enter the room without permission
24. I've learning English for 10 years, so l --------- --- speak English now.
 25. John --------- play the piano when he was a kid, not now he doesn't because he is too busy with his work.
Exercise 3. Fill the blanks with the following modal verbs.
(must, can't, may, might, could)
1. The baby is crying, but he ----- be hungry because he has just eaten.
2. There --------- be something wrong with him. He looks very sad.
3. David --------- be thirsty because he's just drunk some water.
4. He ----------- have stomach ache because he has eatenlot of cakes. But I'm not sure.

Exercise 2:Complete the sentences with the missing modal verbs.
(must, mustn't, don't have to, doesn't have to, can, can't, should, shouldn't, will, won't, may, used to)
1. Maria is six years old. She---------- swim but she---------- drive a car
2. 'I have a toothache'- You ----------- go tothe dentist
3. This dog is bad. You---------play with it.
4.----------- i borrow your book?
5. I---------- take my children to the kindergarten every morning.
6. Jane---------- put on pullover. It's rather hot outside.
7. I ---------lend you my course book because i need it now
8. She thinks she------------- find a better job one day.
9. I hope it ------------ rain tomorrow.
10. You.-------  smoke here. It's forbidden.
11. You --------- brush your teeth at least twice a day
12. The ice is too thin to skate on. It------------- break suddenly
13. Anna has just lost her purse so she---------------- buy a ticket for
the evening concert.
14. Lisa ----------work on Sunday, so she usually gets up late.
15. I----------- -- play hide-and-seek when I was a child.
16. I promise l ------ tidy my room in the afternoon.
17. It---------- rain. Don't forget your umbrella.
18. I----smoke but I gave up.
19. You drive too fast. You ------------ have  an accident one day!
of the computer
20.I ----------_leave now. My dad is waiting for me.
21. ---- - you help me, please?
22. You -------------- spend so many hours in front of the computer.
23. You ------------ enter the room without permission
24. I've learning English for 10 years, so l --------- --- speak English now.
 25. John --------- play the piano when he was a kid, not now he doesn't because he is too busy with his work.
Exercise 3. Fill the blanks with the following modal verbs.
(must, can't, may, might, could)
1. The baby is crying, but he ----- be hungry because he has just eaten.
2. There --------- be something wrong with him. He looks very sad.
3. David --------- be thirsty because he's just drunk some water.
4. He ----------- have stomach ache because he has eatenlot of cakes. But I'm not sure.