1) B. I would love to, but my mum became unwell, so I have to stay by her side until she gets better.
2) B. In 1492, I think, but there are some people who claim that Columbus reached America in 1592.
По третьему образцу Вы дали не полный пример
1 is mary sleeping?
Mary isn't sleeping
2 are you listening to the radio?
You aren't listening to the radio
3 am i studying?
I am not studying
4 are you eating now?
You aren't eating now
5 are we drinking coffee at the moment?
We aren't drinking coffee at the moment
1 resting
Rest
2 are talking
Talk
3 is drinking
Drinks
4 is going
Goes
5 Are they having
Have
6 is she writing
Does she write
7 is he doing
Does he do
8 are they eating
Do they eat
1. What games do you want to play?
2. I like to play chess and checkers.
3. Can you play badminton or tennis?
4. My friend can play table games.
5. I don't want to play hide-and-seek
Breakfast of dad.
Окончание 's и союз of определяют, кому или чему пренадлежит подледащие.