Ex1 underline the mistake in each sentence and write the correct words
1. my older brother can to ride a motorbike, but i can't
2. he'll has his dinner early today because he's going out
3. do you can come to my party?
4. you should to see a doctor about your foot
5. i couldn't bought any bread because the baker's was closed
6. you needn't to do the washing-up . i've already done it
7. the school ought listen to pupils' opnions
8. people shouldn't to drop their rubbish in the street
Ex2: write what they say using the word given
For example : tony wants to borrow his friend's pencil(could)
=> could i borrow your oencil?
1. alex wants to allow her friend to use her dictionary(can)
2. julie wants permission from her teacher to leave the classroom(may)
3. lou wants to wear his brother's new trainers(can)
4. terry wants to ask her boss for permission to take the day off work(could)
5. diane wants to use her dad's car this weekend(can)
6. a teacher wants to give her students five extra minutes to finish the test(may)
Ex3: rewrite the sentences using should or ought to and the words in brackets. you may have to use some negative forms
For example : i nees to earrn more money ( a, get, job, new, you)
=> you should /ought to get a new job.
1. brenda is angry about what i said(are, say, sorry, you, you)
2. tom doesn't understand his homework(about, ask, it, he, his, teacher)
3. i'd like to learn to play the piano(having, lessons, start, you)
4. tina is often tired aT WORK (at, late, night, she, tv, watch)
5. i don't seem to have much energy at the momment(exercise, get, some, you)
a, khi nấu canh đã xg, để bắc nồi canh ra khỏi bếp bn quỳnh dung miếng bắc nồi bị ướt xg r ms thay sang miếng bắc nồi khô. theo e bn quỳnh lm thế có dc ko? vì sao?
b, trg ấm điện dùng để đun nc, vì sao dây đun(dây đốt nóng )đc đặt ở dưới, gần sát đáy ấm mà ko dc đặt ở trên? hiện tg này dựa trên sự truyền nhiệt nào?
c, bình đó an : “ gạo đg nấu trg nồi và gạo đg xát đều nóng lên. về mặt thay đổi nhiệt năng thì 2 trường hợp này có j giống và khác nhau?”
d, khi pha nc chanh bn nga thg lm cho đg tan trg nc r ms bỏ đá vào. vì sao bn nga ko bỏ đá lạnh vào trc r ms bỏ đg vào sau?gthik điều này ntn?
Bài 1 : Viết pt biểu diễn chuyển hóa sau:
\(C\rightarrow Co_2\rightarrow CaCo_3\rightarrow CaO\rightarrow Ca\left(OH\right)_2\)
bài 2 : cho 6,5g kẽm tác dụng vs 100g dung dịch HCl 14,6%
a, Viết pt p/ứng xảy ra
b, chất nào còn dư sao p/ứng
c, tính thể tích hidro thoát ra ở ĐKTC