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

    (?) Were they in Rio last summer?

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

    (?) Did you do your exercise this morning?

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

    (?) Did your parents come to visit you 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 you have a bicycle when you were young?

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

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

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

    (?) Did Ernie eat the last doughnut?

$1$.

$(-)$ They weren't in Rio last week.

$(?)$. Were they in Rio last week?

$2$. 
$(-)$. 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 your parents come to visit you 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 you have a bicycle when I was young?

$6$.
$(-)$. The children didn't go to the zoo yesterday.

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

$7$. 
$(-)$. Ernie didn't eat the last doughnut.

$(?)$. Did Ernie eat the last doughnut?

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#Never_ give_ up