Grammar 1
When there____a lot of grey clouds in the sky, it often rains.
1)is
2)are
are
We can see a/the rainbow.
the rainbow
Rainbows are very beautiful because/but they have a lot of colours.
because
many people
People don't/aren't go outside in the afternoon.
don't go outside
Dolphins can be underwater for three or/but four minutes.
or
When they is/are sleeping, they stay underwater.
are sleeping
They don't/aren't wake up!
Summer is hotter than/then winter.
than
Sometimes it/they help people.
they