1, He is always borowing my pen

2, I wish mrs Mai taught us the next year

3, I wish i could join the trip to HN with my friends

4, dancing this evening

5, going out fora walk

6, trveling during rush hour

Gọi thời gian hai xe gặp nhau la t giờ

Ta có: 30t + 20t = 100

=> 50t = 100 => t = 2 giờ

Quãng đuôngng đi là 2. 60 = 120 km