A

D

I last (go)  went to Spain in 1990.

=>x²+2x+1-x²-x=0

=>x+1=0

=>x=-1

Vậy x=-1

1.My father (go) goes to work by bike.

2.We (not live) don't live in an apartment in town.

3.We (sit) are sitting in the living room.

4.What (you/do) are you doing at the momemt.

5.My brother(have) has breakfast at seven every morning .

6.My mother is at the shop.She (buy) is buying some bread.

7.There (be) are flowers and trees in the park .

8.What time(school/start) does school start in the morning ?

9.My sister (cook) is cooking dinner tonight.

10.Nam can(speak) speak French.