5. Unless he studies hard, he will fail the exam 

=> If he _______________, he will fail the exam 

7. She said to him, '' What do you do in your free time ? ''

=> She asked him ______________ free time

1. Jackson's fans were ________ as he cancelled the corcert (DISAPPOINT)

2. Tet is one of the most important _______ for Vietnamese people (CELEBRATE)

3. _________, the typhoon didn't cause any damage on the village (LUCKY)

4. These bulbs use less _________ than ordinary (ELECTRIC)

Questin 12 : Doctors/ suggest/ clean/ hands/ soap/ water/ regularly/ to protect yourself/ he spread COVID-19

=>

6. Tom failed the exam because of his laziness

=> Because Tom

7. It was raining so we decided to put off the meeting

=> We decided

8. Happy New Year is a song. It is sung at Tet 

=> Happy New Year is

9. The scientist has won the Nobel Prize. He discovered a new planet

=> 

10. Unless he does exercise regularly, he will gain weight

=> He will gain weight if

VI. Rewrite these exercise :
1. The weather was nice, so we spent the whole day in the garden

=> We spend

2. I suggest turning off the fans and lights before leaving the classroom

=> Shall we

3. The last time i saw him was 5 years ago

=> I haven't

4. Since she was dizzy, she couldn't ride her bike to school

=> She was dizzy,

5. Let's play a game 

=> Ba suggest 

6. If/ weather/ fine/ we/ go/ picnic

=>
7. If/ we/ go/ wasting water./ there/ be/ shortage/ fresh water/ few decades

=> 

8. It/ necessary/ use/ energy-saving bulbs/ instead/ ordinary bulbs

=>

9. We/ suggest/ learn new words/ do/ exercise/ everyday

=>
10. We/ do/ this exercise/ 30 minutes

=>

1. Our teacher/ disappointed/ we/ not learn/ lessons/ yesterday

=>

2. I/ suggest/ turn/ light/ when/ roon/ light enough

=>

3. How about/ plant/ green trees/ school garden

=>
4. The students/ collect/ garbage/ streets/ at present

=>

5. We/ pleased/ you/ try/ study English

=>

Bằng phương pháp hóa học hãy:
d) Tách riêng từng chất ra khỏi hỗn hợp gồm: C2H5OH, CH3COOH.

nhận biết 3 chất lỏng bằng phương pháp hóa học : rượu etiylic, dầu ăn, dầu hỏa