II. Choose the best answer.

1.I like ………..because I like to learn about the numbers.

A. literature         B. Geography       C. History            D. Math

2. The hotel is in front of the car park so the car park is ……. the hotel.

A. between            B .behind            C. next to              D.opposite

3. People often play sports at the ………….

A .factory      B. movie theater                   C. stadium                 D.bakery

4. Why do you like flowers? – Because ………. beautiful.

A. They’re                 B.It’s               C. There’re                D. We’re

5. The weather is………… in the deserts.

 A. hot            B.warm                       C. cold                       D. foggy

6. Her…………season is spring.

A. nice                       B. beautiful               C. favourite               D. interesting

7. We save the earth by not……… forests.

A.make                       B. lifting                    C. cutting                   D. bringing

8. There isn’t ………in the next room.

 A. some one             B. no one                   C. any one                 D.somebody

9. The football match………… at three o’clock.

 A. does                     B. gives                      C. watches                 D. finishes

10. Could I have a………… of matches, please?

 A. bar            B. can             C. box            D.bottle

11. Ho Chi Minh city is………… city in Vietnam.

 A. the bigger            B. biggest                   C. the biggest D.more big

12. I learn music………………. : on Mondays and Fridays.

 A. two times a week                       B. once aweek

 C.one aweek                        D. twice a week

13. Which month is ……………?  May or June.

 A. hottest                  B. hotter                     C. more hot               D. hot than

14. She doesn’t have ………..friends at school.

 A. a                            B. some                      C. many                     D. much

15. Why don’t we go camping? ………… a good idea.

 A. Let’s                     B.That’s                     C. It                             D. With

16. There are five …………. in one hand.

 A. fingers                 B. arms                       C. toes                                    D. feet

17. We……….. stop when the light is red.

A. can’t                      B. can             C. mustn’t                              D. must

18. What is your favourite food?

 A. I favourite chicken                    B. My favourite food chicken

 C. Chicken favourite me                D. I like chicken best.         

19. Linda ……… her hair every day.

 A. washes                 B. wash                      C. clean                      D.cleans

20 .How many minutes are there in………… hour?

 A. a                B. an               C. the              D. these

21.What are there in this box?  ………….. of shoes.

 A. a couple               B. a pair                     C. some                      D . afew

22. It’s hot ………. our country …….. the summer .

 A. in/in                     B. in/on                      C. in/at                                   D. on/in

23. I often help my mother …….. her housework.

 A. of                          B. with                                   C. for                          D .from

24. My sister …….. a new language every year.

 A. study                    B. studies                   C. works                    D. prepares

25. When it becomes hot, people often feel  ……..

 A.hungry                   B. thirsty                    C. happy                    D. full

26. The boy looks a little thin ,……….. he’s strong.

 A. and                                   B. for                          C. or                           D. but

27. Mary and ……… would like to join the English Speaking Clup.

 A. me                        B. my                         C. mine                      D. I

28. Please read the dialogue……………

 A. aloud                    B. loud                                   C. loudly                    D. loudily

29 . I always get up early. I ………. get up late.

 A. usually                 B.often                                   C. never                     D. sometimes

 30. Classes ……… at 7.15 every morning.

A. start   B. starts                      C. is start                   D. starting

Gì lâu z =)) 

Sao lâu rồi không thấy ziang hiện lên z :)) 

1. My house is near………..., so I often go there and play chess with her.

A. his                  B. her                       C. she                   D. hers

2. “………. watch TV too much.”

  “I see.”

A. Not                  B. Do                    C. Don’t                D. Did

3. The clock is…….… the wall …….…. the two pictures

A. on/in                B. in/between        C. on/between       D. under/between

4. She was tired,…….…..she went to bed early.       

A. so                     B. but                     C. or                    D. because

5. In the future, robots…….behave like humans.

A. must                 B. might                C. need                 D. should

6. The three Rs………for Reduce, Reuse and Recycle.

A. stand                B. sit            C. make                         D. explain

7. Lake Baikal is the…….….freshwater lake in the world.

A. large                 B. large        C. largest                         D. more large

8. If we cut down more forest, there…….…...more flood.  

A. are                    B. were                  C. have been          D. will be

9. The opposite of “dangerous” is………...

A. safe                  B. good                 C. dirty                 D. polluted

10. “………do you go to the gym?”- “By bus.”

A. What                B. Why              C. Who                    D. How

Qua khe đậu, ló ra mấy quả ớt đỏ chót.

- TN: Qua khe đậu.

- CN: ló ra mấy quả ớt.

- VN: đỏ chót.

Tớ nghĩ bài khảo sát thì cậu nên tự làm vẫn hơn : ).

Tóm tắt:

\(s=18km\\ =18000m\\ t=30min\\ =1800s\\ F=2000N\\ ------------\\ A=?J\\ P\left(hoa\right)=?W\) 

Động cơ xe tăng gấp 2 thì

\(v=?m/s\) 

Giải:

Công: \(A=F.s\\ =2000.18000=36000000\left(J\right)\) 

Công suất của xe: \(P\left(hoa\right)=\dfrac{A}{t}\\ =\dfrac{36000000}{1800}=20000\left(W\right)\) 

Vận tốc của xe lúc này: \(v=\dfrac{s}{t}\\ =\dfrac{18000}{1800}=10\left(m/s\right)\) 

Nếu động cơ xe tăng gấp 2 lần thì vận tốc xe là: \(10.2=20\left(m/s\right).\)