Grammar

1. It is really hot today. Let's cool down by jumping into the water.
2. Sam put his books on the floor.
3. Did Mary lose her umbrella？
I don't know. Let me ask her.
4. The children are reading their books.
5. We are happy because someone gave us a big present.
6. The dog has a bone in its mouth
7. It is their ball.Give it back to them.
8. Don't lend him any money!He will not pay you back.
9. The book is not yours!Give it back to me.


I hope I can help you!

+oil

1) ourselves (cool ourselves = 使我們涼快)
今天很熱, 我們跳到水裡好讓(自己)涼快一下吧
2) his
森把(他的)書放在地上
3) her, me, her
瑪利弄丟了(她的)傘嗎? 我不知道, 讓(我)問(她)一下
4) their
小朋友在看(他們的)書
5) us
我們很開心, 因為有人送(我們)一份大禮
6) its
那條狗有一塊骨頭在(它的)口裡
7) them
這是他們的球, 把它還給(他們)
8) him
不要借(他)任何錢! 他不會還給你的
9) yours
這本書不是(你的)! 把它還給我

這9條題目都是問你我他等的代名詞吧, 所以第1條應該不是down,
Let's = let us, 所以不能再寫us, 答ourselves

1)It is really hot today .Let"s cool down by jumping into the water.
(2)Sam put his books on the floor.
(3)Did Mary lose her umbrella?
I don't know.Let me ask her.
(4)The children are reading their books.
(5)We are happy because someone gave us a big present.
(6)The dog has a bone in its mouth
(7)It is their ball.Give it back to them.
(8)Don't lend him any money!He will not pay you back.
(9)The book is not yours!Give it back to me.

+oil

1. It is really hot today. Let's cool down by jumping into the water.
2. Sam put his books on the floor.
3. Did Mary lose her umbrella？
I don't know. Let me ask her.
4. The children are reading their books.
5. We are happy because someone gave us a big present.
6. The dog has a bone in its mouth
7. It is their ball.Give it back to them.
8. Don't lend him any money!He will not pay you back.
9. The book is not yours!Give it back to me.

1)It is really hot today .Let"s cool down by jumping into the water.
(2)Sam put his books on the floor.
(3)Did Mary lose her umbrella?
I don't know.Let me ask her.
(4)The children are reading their books.
(5)We are happy because someone gave us a big present.
(6)The dog has a bone in its mouth
(7)It is their ball.Give it back to them.
(8)Don't lend him any money!He will not pay you back.
(9)The book is not yours!Give it back to me.