_______ you can sleep well, you will lose the ability to focus, plan and stay motivated after one or two nights.( )
Once
Unless
If
When
_________ we don't stop climate change, many animals and plants in the world will be gone.
Although
While
Until
-Hi, I'm Peter. Are you new here? I haven't seen you around?
-Hello, Peter. I'm Bob. I just _________ on Monday.
start
have started
started
had started
If we ___________the flight yesterday, we would be enjoying our holiday on the beach.
had caught
caught
have caught
would catch
It was only when the car pulled up in front of our house ___________we saw Lily in the passenger seat.
which
that
when
where
My washing machine ___________this week, so I have to wash my clothes by hand.
was repaired
is repaired
is being repaired
has been repaired