1. Hung doesn't want to go out for dinner because he feels tired.

2. Why don't we get a cup of coffee and take a break?

3. Are you and your father going to watch a soccer match on TV tonight?

Reporter : Hello. What's your name?

Mai : My name is Mai

Reporter : How old are you?

Mai : I'm thirteen

Reporter : Where are you from

Mai : I'm from Hue

Reporter : Which language do you speak?

Mai : I speak Vietnamese

Reporter : Which school do you go?

Mai : I go to Nguyen Du school

Reporter : Which grade are you in?

Mai : I'm in grade 6

1. Young people ______ obey their parents.
a. must
c. will
b. may
d. ought to
2. Laura, you and the kids just have dinner without waiting for me. I ______ work very hard today.
a. can
c. should
b. may
d. would
3. I ______ be delighted to show you round the factory.
a. ought to
c. might
b. would
d. can
4. Leave early so that you ______ miss the bus.
a. didn’t
c. shouldn’t
b. won’t
d. mustn’t
5. Jenny's engagement ring is enormous! It ______ have cost a fortune
a. must
c. will
b. might
d. should
6. You ______ to write them today.
a. should
c. had
b. must
d.ought
7. I hope I ______ find it.
a. will
c. could
b. shall
d. must
8. Unless he runs he______ catch the train.
a.will
c.wouldn’t
b. mustn’t
d.won’t
9. _____ you be in Rome tonight.
a. will
c. might
b. may
d. maybe
10. We ______ have time to help you tomorrow.
a. may
c. will
b. must
d. could.
11. “______ you hand me that pair of scissors, please?”
a. May
c. Shall
b. Will
d. Should
12. Jeanette did very badly on the exam. She _____ harder.
a.must have studied
c. could have studied
b. should have studied
d. must studied
13. He was very lucky when he fell off the ladder. He _____ himself.
a. could have hurt
c. must have hurt
b. should have hurt
d. will have hurt
14. Marcela didn’t come to class yesterday. She _____ an accident.
a. should have had
c. must have
b. might have
d. may have had
15. John still hasn’t come out. He ______ everything for the trip now.
a. must have been preparing
c. must be preparing
b. will be preparing
d. will have prepared
16. Thomas received a warning for speeding. He _____ so fast.
a. shouldn’t have driven
c. should have
b. would have driven
d. might have driven
17. The photos are black. The X-ray at the airport _____ them.
a. should have damaged
c. would have damaged
c. would damage
d. must have damaged
18. Tom didn’t do his homework, so the teacher became very angry. He _____ his homework.
a. must have done
b. should have done
c. might have
d. will have done
19. My car stopped on the high way. It _____ out of gas
a. may run
c. must be
b. may have run
d. should have run
20. Robert arrived without his book. He _____ it.
a. could have lost
c. would have lost
b. should have lost
d. will have lost

My mom is my important people in the life. She is a teacher in a upper secondary school. She teaches English. She is 38 years old. She is short and thin. She has a good shape. She has an oval face with a long black hair. She has a delicate nose in front of the red full lips. Her eyes are black and affectionate. Her ears are big. Her hands are white. Outside, she isn’t beautiful than others, but in my eyes, she is the most beautiful. She cooks delicious food and very great. I love her food. It countains feeling for my mother. My mother also looks after me when I am a kid. My mom always teaches me Literature in the evenings. My mom usually kind and easy going with everyone. And she always smile. She is very kind with my family so I love her very much. Because love her so I will learn very good for her often happy and has many fun.

b, \(\left(\dfrac{1}{2}-1\right).\left(\dfrac{1}{3}-1\right).\left(\dfrac{1}{4}-1\right)...\left(\dfrac{1}{1000}-1\right)\)

\(=\dfrac{-1}{2}.\dfrac{-2}{3}.\dfrac{-3}{4}...\dfrac{-999}{1000}\)

\(=\dfrac{\left(-1\right).\left(-2\right).\left(-3\right)...\left(-999\right)}{2.3.4...1000}\)

\(=\dfrac{-1}{1000}\)

a, \(\left(\dfrac{1}{2}+1\right).\left(\dfrac{1}{3}+1\right).\left(\dfrac{1}{4}+1\right)...\left(\dfrac{1}{999}+1\right)\)

\(=\dfrac{3}{2}.\dfrac{4}{3}.\dfrac{5}{4}...\dfrac{1000}{999}\)

\(=\dfrac{3.4.5...1000}{2.3.4...999}\)

\(=\dfrac{1000}{2}\)\(=500\)

Số lớn nhất có bốn chữ số khác nhau là 9876

Số nhỏ nhất có bốn chữ số khác nhau là 1023

Tổng là:

9876 + 1023 = 10899

ĐS:10899

Gọi số tổ là \(a\)

Ta có: \(195⋮a;\) \(117⋮a;\) \(a\) lớn nhất

Do đó \(a=ƯCLN\left(195;117\right)\)

\(195=3.5.13\)

\(117=3^3.13\)

\(ƯCLN\left(195;117\right)=3.13=39\)

\(ƯC\left(195;177\right)=Ư\left(39\right)=\left\{1;3;13;39\right\}\)

Vậy: có 4 cách chia tổ

\(x\dfrac{x}{15}=\dfrac{112}{5}\)

\(\Rightarrow\dfrac{15x+x}{15}=\dfrac{112}{5}\)

\(\Rightarrow\dfrac{15x+x}{15}=\dfrac{336}{15}\)

\(\Rightarrow15x+x=336\)

\(16x=336\)

\(x=336:16\)

\(x=21\)

Vậy \(x=21\)

\(\dfrac{1}{x}+1=\dfrac{13}{25}\)

\(\dfrac{1}{x}=\dfrac{13}{25}-1\)

\(\dfrac{1}{x}=\dfrac{-12}{25}\)

\(\Rightarrow-12.x=1.25\)

\(-12.x=25\)

\(x=25:\left(-12\right)\)

\(x=\dfrac{-25}{12}\)