3.10......................................
Понимаешь твой вопрос очень странный , он не уместный . Есть водопады , а ниагар это название его
<span>The monkey isn't climbing a tree
</span><span>Is the monkey climbing a tree?
</span><span>The monkey didn't climb a tree
</span><span>Did the monkey climba tree?
</span><span>The man didn't sleep
</span><span>Did t he man sleep?
</span><span>Katya isn't listening to the radio
</span><span>Is Katya listening to the radio?
</span><span>Katya didn't listen to the radio
</span><span>Did Katya listen to the radio?
</span><span>Misha isn't eating a sandwich
</span><span>Is Misha eating a sandwich?
</span><span>Misha doesn't eat a sandwich </span>
<span>Does Misha eat a sandwich?
</span><span>
Liza and Masha don't play
</span><span>Don't Liza and Masha play?</span>