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17 tháng 4 2022

1. This book was interesting. It wasn't boring.
2. They were Japanese. They weren't American.
3. We were in the café. We weren't at school.
4. Tweetie was a bird. He wasn't a parrot

17 tháng 4 2022

1. Where were you yesterday?
2. Were they at the cinema?
3. Who was your favourite actor?
4. Was she a maths teacher?
5. When were they born?
6. Was he famous in the 1940s?

1 tháng 4 2022

went / prepared / took / played / watched / danced / rained

1/ went
2/ prepared
3/ took
4/ played
5/ watched
6/ danced
7/ rained

6 tháng 11 2021

B.
 \(=\left(3^4\right)^3:3^5=3^{12}:3^5=3^7\)

23 tháng 3 2022

b

23 tháng 3 2022

D

DD
22 tháng 11 2021

Bài 4: 

a) \(x+xy-3y=4\)

\(\Leftrightarrow x-3+y\left(x-3\right)=1\)

\(\Leftrightarrow\left(x+y\right)\left(x-3\right)=1\)

mà \(x.y\)là số nguyên nên ta có bảng giá trị: 

x+y1-1
x-31-1
x42
y-3-3

b) \(BCNN\left(6,7\right)=42\)nên \(BC\left(6,7\right)=B\left(42\right)\).

\(200< 6k< 2000\Rightarrow33< k< 334\)

suy ra có \(334-33-1=300\)giá trị của \(x\)là bội của \(6\)mà \(200< x< 2000\).

\(200< 7l< 2000\Rightarrow28< l< 286\)

suy ra có \(286-28-1=257\)giá trị của \(x\)là bội của \(7\)mà \(200< x< 2000\).

\(200< 42m< 2000\Leftrightarrow4< m< 48\)

suy ra có \(48-4-1=43\)giá trị của \(x\)là bội của \(42\)mà \(200< x< 2000\)

Số giá trị của \(x\)thỏa mãn ycbt là: \(300+257-43=514\)(số) 

17 tháng 4 2022

you didn't watch a film

Did you watch a film?

What did you watch?

 

17 tháng 4 2022

You watched a film

You didn't watch a film

Did you watch a film?

What did you watch?

17 tháng 4 2022

b) Did they lock the door?
c) Did she open her present?
d) Did he carry the boxes?

e) Did you call your best friend?
f) Did she play volleyball?
g) Did your brother study History?
h) Did you wait for the bus?
i) DId he listen to music last night?
j) Did they help their mother? 

17 tháng 4 2022

did they lock the door

Did she open the present

Did he carrie the boxes

Did you call your bestfriend