1.No,they arne't

2.They first met at the primary school

3.Vy likes to joke and play games

4.Vy is a preety girl with dimpled cheeks

5.They usually meet at Mai's house

6.They're in Mai's room

7.This Sunday morning they are going to the school English club

$Bài1$

a, 1, $CaC_2+H_2--to--> Ca+ C_2H_2 (k)$

2, $C_2H_2+H_2----> C_2H6 (k)$

3, $C_2H_6+Cl_2---->C_2H_5Cl(k)+HCl$

b,

1, $2CH_4--to--> C_2H_2(k) + 2H_2(k)$

2, $C_2H_2+H_2--to--> C_2H_4(k)$

3, $Br_2+ C_2H_4----> C_2H_4Br_2$

c,

1, $CaC_2+H_2-> Ca+ C_2H_2(k)$

2, $C_2H_2+H_2----> C_2H_4(k)$

VII

1.no, they aren't

2.they first met at the primary school

3.vy likes to joke and play games

4.vy is a pretty girl with dimpled cheeks

5.they usually meet at Mai's room

6.they're in Mai's room

7.this Sunday morning they are going to the school English club