$\text{1. They weren't in Rio last summer}$

  $\text{Were they in Rio last summer?}$

$\text{2. We didn't do excercise this morning}$

    $\text{Did we do the excercise this morning?}$

$\text{3. My parents didn't come to visit me last July}$

  $\text{Did my parents come to visit me last July?}$

$\text{4. The hotel wasn't very expensive}$

$\text{   Was this hotel very expensive?}$

$\text{5. I didn't have a bicycle when I was young}$

    $\text{ Did you have a bicycle when you were young?}$

$\text{6. The children didn't go to the zoo yesterday}$

  $\text{ Did the go to the zoo yesterday?}$

$\text{7. Emie didn't eat the last doughnut}$

  $\text{ Did Emie eat the last doughnut?}$

$\text{8. They didn't buy a new house last month}$

    $\text{ Did they buy a new house last month?}$

CHO XIN HAY NHẤT Ạ!

1.

(-)They weren't in Rio last summer.

(?)Were they in Rio last summer?

2.

(-)We didn't do our exercise this morning.

(?)Did we do our exercise this morning?

3.

(-)My parents didn't come to visit me last July.

(?)Did my parents come to visit me last July?

4.

(-)The hotel wasn't very expensive.

(?)Was the hotel very expensive?

5.

(-)I didn't have a bicycle when I was young.

(?)Did I have a bicycle when I was young?

6.

(-)The children didn't go to the zoo yesterday.

(?)Did the children go to the the zoo yesterday?

7. 

(-)Ernie didn't eat the last doughnut.

(?)Did Ernie eat the last doughnut?

8.

(-)They didn't buy a new house last month.

(?)Did they buy a new house last month?

Xin hay nhất ạ