Bài 1: Theo dõi thời gian làm bài một bài toán (tính bằng phút) của một nhóm học sinh. Thầy giáo ghi lại như sau:

a. Dấu hiệu ở đây là gì? Số các giá trị là bao nhiêu?

b. Hãy lập bảng tần số

thế nào là một dao động?

cần gấp

1. - “What would you like to drink now?” - “_______________.”
A. No, thanks   B. Yes, please
C. I like to do nothing   D. Orange juice, please
2. All of us enjoy _______ to classical music.
A. listen   B. listens   C. listening   D. listened
3. She worked very hard, _______she passed all her exams.
A. because   B. and   C. so   D. but
4. Hoa looks red. She was outdoors yesterday. Perhaps she has _______
A. flu   B. sunburn   C. spots   D. stomachache
5. My family has decided to use _________ electricity by using more solar energy instead.
A. more   B. less   C. much   D. fewer
6. I ............... playing board games interesting because I can play them with my friends.
A. find   B. think   C. say   D. tell
7. -“ Would you like me to turn off your computer?
- “ ______________. I’ll do it myself”
A. No, thanks   B. Yes, please   C. Don’t do it   D. Of course
8. You like playing monopoly or chess, your hobby may be _______.
A. collecting things.   B. playing sports
C. dancing   D. board games
9. I …………….. Nha Trang when I was a child.
A. visit   B. visited   C. will visit   D. have visited
10. He …………… to the USA so far.
A. is   B. was   C. will be   D. has been
11. Americans eat a lot of junk food, ………….junk food causes obesity.
A. but   B. and   C. so   D. because
12. Tim: I feel itchy and my nose is running. Doctor: ………………………..
A. Wash your hair more.   B. I think you have the flu.
C. Drink more water. Eat less meat   D. I think you have a stomachache.
13. Pick out the word whose main stress is placed differently from the others.
A. allergy   B. headache   C. temperature   D. obesity
14. Choose the word that has the underlined part pronounced differently from the others.
A. cold   B. curly   C. ocean   D. clothes
15. It is interesting _____________ tree leaves from different countries.
A. collecting   B. to collect   C. collect   D. collects
16. My dad enjoys ________ his bike to work.
A. to ride   B. ride   C. rides   D. riding
17. I love cooking, _________ my sister doesn’t.
A. because   B. so   C. but   D. and 
18. Laughing is good _______ your health.
A. for   B. to   C. with   D. of
19. Choose the word that has the underlined part pronounced /3:/
A. dear   B. pear   C. earn   D. heart
20. Choose one mistake and correct it.
I find carve eggshells boring because it takes a lot of time to complete one shell

dân chép mạng

B nha bạn

B nha

   Ghép hai gương phẳng G₁ và G₂ vuông góc, mặt phản xạ hướng vào nhau như hình vẽ. Chiếu tia sáng tới SI hợp với mặt G₁ góc 30^o Vẽ tiếp đường đi của tia sáng?