Nêu những nhiệm vụ cần thiết của Đảng và Chính phủ sau cách mạng tháng Tám năm 1945

1. I'll buy a new hat. I'll give it to you.
If______________________________.
2. Today isn't Sunnday. The pupils can't go swimming.
If______________________________.
3. He isn't here. He doesn’t have a lot of fun.
If______________________________.
4. My brother will have enough money. He will buy a bicycle.
If______________________________.
5. He doesn’t have time. He doesn’t read this novel.
If______________________________.
6. Because she misses the bus, she is late.
If______________________________.
7. Peter doesn't study hard, so he can't get good marks.
If______________________________.
8. My sister is absent from her class because she has a terrible headache.
If______________________________.
9. Windy doesn’t come, so we cancel the meeting.
If______________________________.
10. He is angry, so he doesn’t say anything.
If______________________________.

1.      It was raining, so we decided to postpone our camping.

   @ Since _____________________________________________________

2.      She wants them to sing a song.

   @ She suggests they ____________________________________________

3.      She couldn’t join us because she was busy.

   @ She was busy, so ___________________________________________  .

4.      Shall we go to the cinema tonight?

   @ What about _________________________________________________  

5.      Why don’t we use energy-saving bulbs?

   @ I suggest ___________________________________________________  

6.      Although she was not beautiful, she took part in a beauty contest.

   @ She wasn’t beautiful but _______________________________________  

7.      Work hard and you will pass the exam.

   @ If you _____________________________________________________

8.      If you don’t start working hard now, you won’t be able to pass the final exam.

   @ Unless ____________________________________________________  

9.      We are delighted. You passed your English exam.

   @ We are delighted ___________________________________________  .

10.  She was tired and therefore she wanted to go home.

   @ She wanted to go home because _________________________________  

1.      Can you turn ________the light? -It’s too dark.

           A. on                        B. off                            C. in           D. for

2.      I suggest ________showers instead of taking bath.

           A. take                      B. taking                       C. to take           D. to taking

3.      - What are you looking ________? - My picture book. I’ve lost it.

           A. on                        B. off                            C. in           D. for

4.      A new air-conditioner will be ________tomorrow morning.

           A. to intall                 B. installed                    C. installing           D. install

5.      Scientists are looking for an ________way to reduce energy consumption.

           A. effect                    B. effection                   C. effective           D. effectively

6.      They are completely short of water now. A number of people have died because of this ________.

           A. shortage                B. short                         C. shorten           D. shortly

7.      If you want to save money, you should ________the amount of water your family uses.

           A. increase                B. reduce                      C. adapt           D. repair

8.      In order to save electricity, an ordinary 100-watt light bulb can be replaced by a(n) ________.

           A. energy-saving bulb B. energy-save bulb       C. saving energy bulb           D. save-energy bulb

9.      You should get a (n)________to make sure there are no cracks in the pipes.

           A. plumber                B. mechanic                  C. electrician           D. consumer

10.  ________you take the train instead of the bus? It’s faster and cheaper.

           A. Why not                B. Why don’t                C. How about           D. Let’s

Vật AB có độ cao 1cm, đặt cách thấu kính hội tụ một khoảng 36cm, A nằm trên trục chính, thấu kính có tiêu cự 12cm.

a. Vẽ ảnh của vật qua thấu kính hội tụ (theo đúng tỉ lệ)?

b. Tính khoảng cách từ ảnh đến thấu kính và độ cao của ảnh?