bài 1: 

A= 5^2/1.6+5^2/6.11+......+5^2/26.31

B= 2-2/19+2/43-2/1943/3-3/19+3/43-3/1943

các bn ơi, giúp mk với, mk cần gấp

1. they (wait) .............................. until evryone was ready  anh then thay (start).................... the meeting

2. mike (feel) .............................. nervous when he first (drive) .................................... in britain because he ( not drive)................................. on the left before

3. andrew (do) ................................... the test before, so he (find) .............................. it very easy.

4. i ( not laugh) ....................... at the joke because i (hear) ............................... it before

5. we (leave) ................................ the restaurant when we (have) ................... dinner

6. when i found my wallet i ( discover) ............................................. that somebody ( take).............................. the credit cards out of it.

7. when i ( speak) ................................. to the woman i ( realize) ............... i

8. it ( rain) .................................. yesterday after it ( be) ............................ dry months.

9. by the time  he ( arrive ) ..............................., all his classmates (leave) ......................

10. we (not have) ......................... their new phone number because they ( move) ............................... to the south

11. when they (meet) again, they (meet) ................................ again, they ( not meet) .......................................... each other for 10 years

CÁC BN ƠI, GIÚP MK VỚI

bài 1: so sánh

a) 2/-7 và -3/11

b) 2/5 và 6/13

c) 13/-4 và 16/-5

d) -17/35 và -17/-34

e) -13/5 và -13/7

f) -4/15 và -4/13

các bn ơi, giúp mk vớiiiiiiii

các bn ơi, giúp mk với

"em hãy vẽ một bài sơ đồ tư duy về khu vườn'

các bn giúp mk mới

Complete the second sentence so that it means the same as the first, using no more than three words

1. my parents prefer using the telephone to using e-mail

--> my parents think using the telephone is better........e-mail.

2. my neigbour is confused by modern technology

--> modern technology........my neighbour 

3. whose is this mobile phone?

--> who does this mobile phone..........to?

4. when i look at a screen for too long, i find it tiring

--> i get.........when i look at a screen for too long.

5. why don't you send Anne a tect message?

--> if i were you,..........send Anne a tect message

các bn giúp mk với, mk cần gấp

A= 1/2+1/6+1/12+1/20+...+1/132+1/156

B= 1/10+1/15+1/21+...+1/66+1/78+1/91+1/105

C= 1/2+5/6+11/12+...+109/110+...+599/600+649/650

cíu mìn zớiiii