Correct

to => of

bỏ about

that have => to have

Correct

She waited for years for him to pop the question
- pop the question: ngỏ lời cầu hôn 
^^

Whenever you drive a motorbike, it is important to wear a helmet

It is good for us to eat different kind of fruits and vegetables in our daily meals

I am delighted to know that you have passed the entrance exam

It is nice of you to help me last SundayIt is necessary for all of us to get access to high quality education system

https://hoc24.vn/cau-hoi/mn-oi-giup-em-voi-a-3-ngay-mai-em-ktra-r-a-3thanks-mn-nhieu-i-write-sentences-using-the-second-or-third-conditional1-i-would-travel-to-india-if.379592893608

Chào em, em tham khảo nhé!

1: He wanted to talk to her - if only/ he/ not be/ so shy

=> If only he hadn't been so shy.

2:Sarah is my best friend - I wish/ I / see/ her/ more often

=> I wish I could see her more often.

3: I'd love to be a pop star. - I wish/I/can/sing

=> I wish I could sing.

4:We wanted to send her a letter. - If only we/ know/ her address

=> If only we had known her address.

5:I feel so tired. - I wish / I / not go out / yesterday

=> I wish I didn't go out yesterday.

Chúc em học tốt và có những trải nghiệm tuyệt vời tại hoc24.vn!

II> Write wishes using the prompts 

1: He wanted to talk to her - if only/ he/ not be/ so shy

If only he hadn't been so shy.

2:Sarah is my best friend - I wish/ I / see/ her/ more often

I wish I saw her more often

3: I'd love to be a pop star. - I wish/I/can/sing

I wish I could sing.

4:We wanted to send her a letter. - If only we/ know/ her address

If only we had known her address.

5:I feel so tired. - I wish / I / not go out / yesterday

I wished I hadn't gone out yesterday.

Rock music is not as popular as pop music all over the world.
This year's music contest is not like last year's.

Do ƯCLN(a; b) = 5 nên đặt a = 5x; b = 5y (x và y nguyên tố cùng nhau)

Do a + b = 300

⇒ 5x + 5y = 300

⇒ 5(x + y) = 300

⇒ x + y = 60

⇒ (x; y) ∈ {(1; 59); (7; 53); (11;49); (13; 47); (17; 43); (19; 41); (23; 37); (29; 31); (31; 29); (37; 23); (41; 19); (43; 17); (47; 13); (49; 11); (53; 7); (59; 1)}

⇒ (a; b) ∈ {(5; 295); (35; 265); (55; 245); (65; 235); (85; 215); (95; 205); (115; 185); (145; 155); (155; 145); (185; 115); (205; 95); (215; 85); (235; 65); (245; 55); (265; 35); (295; 5)}

A=25

B=275