Axit sunfuric: H₂SO₄

Canxi cacbonat: CaCO₃

14. D (like + V-ing)

15. A (S + be/auxiliary verb, too)

Tình hữu nghị giữa các dân tộc trên thế giới là quan hệ ..................................giữa các nước, các dân tộc trên thế giới với nhau. *

A gần gũi, ràng buộc.

B hợp tác, đồng minh.

C bạn bè thân thiện.

 D láng giềng, đồng chí.

9 plus 10 equal 19 

Bạn tham khảo nha:

We managed _______ over the wall without ________.

a. to climb/ seeing

b. climbing/ being seen

c. to climb/ being seen

d. to be climbed/ seeing

1. Do you often walk?

Not often. Sometimes i spend 10-15 mins walking around.

2. Did you walk much when you were a child?

Yes. When I was a child, I was very naughty.

3. Do you think people walk more nowadays than they did in the past?

From my point of view, people now walk less because they have fast transportation. But there are still people who still keep that healthy habit until now.