Sắp xếp các từ đã cho thành câu hoàn chỉnh
1. even/ I / me / if / will / to / never / apologizes / forgive / he / him
2. to / You / may / have / early / you / if / leave
3. specialties / Thailand / local / visit / , / the / to / try / happen / should / you / If.
4. harder / your / you / work / in / can / you / achieve / If / more / , / life
5. promotion / he / get / must / to / dedication / show / wants / his / James / hard / If / work / , / and
6. Will / time / you / afford / come / can / to / you / my / if / house?
7. if / job / he / do / to / What / change / can / he / wants / his ?
8. trouble / , / you / in / help / can are / call / you / me / If / for
Viết câu điều kiện loại 1 với " if " dựa vào các câu cho sẵn :
1. Stop telling lies or no one will trust you anymore =>…………………………………………
2. Go to bed early or you may be exhausted the next morning =>…………………………………………
3. Save money from now and you can reward yourself with a long vocation at the end of the year =>…………………………………………
4. Read more books and you can broaden your knowledge =>…………………………………………
5. Unless you want to get sick, you should eat more healthily =>…………………………………………
1. If it ( not pour ) ________ with rain tomorrow , we can ( go ) ______ on a picnic
2. If James ( start ) _______ to cook now, dinner ( be ) ______ ready in one hour
3. If Jane ( not make ) ________ it the meeting on time, her manager may (get) ________ very angry
4. If they ( be )________ occupied this weekend ,they can ( not come ) _______ to my house for dinner
5. You must ( not leave) _________ the house unless I ( allow )________ you to go
6. Peter ( just waste ) ________ his money if he ( take )________ a course in this English center
7. If he ( be ) __________ late , he can ( not buy ) ________ the tickets
8. Unless she ( pay )________ more attention to the lesson, she ( fail ) _______ the test
9. It ( be )_______ late if you ( not start ) ________ your work now
10. My mother ( not permit )_______ me to go out unless I ( promise ) _______ her to come back before 10
Nhận biết các dung dịch sau đây đựng riêng trong các lọ mất nhãn. Các dụng cụ và hóa chất có đủ.
H2SO4, HCl, BaCl2, NaOH, Ca(OH)2
Hướng dẫn : các chất gồm 2 dung dịch axit, 2 dung dịch kiềm, 1 dung dịch muối trung tính . Vì vậy khi thử bằng quỳ tím sẽ nhận ra một chất và phân biệt hai nhóm chất