Do you know that it ... ten hours to fly there ?
The speed ... is 50 km .You're driving too fast.
You can't drive more than 35 km ... hour in town.
The museum is 5 miles ... here
What would you do if you ... the lottery?
If I ... enough money, I ... a telescope.
If it ..., I ... at home.
My parents ... happy, if I ... my exams.
I ... to the party, if I ... time.
He ... unless he ... busy.
If Mary ... more money, she ... a new car.
If I ... with you, I ... let you do this.
She ... the book unless she ... given it to John.
Water ... if you ... it to 0° C.
Emma always ... if she ... be late.
If you ... a new planet, what ... you ... it?
If you ... this film yesterday, you ... it.
Helium is a light gas which is used in ... .
The force which attracts objects towards the Earth is ... .
Greenhouse gases damage the Earth's ...
Look ...! You nearly walked into me!
... sure you don't leave the door open.
... the floor - it's wet.
Keep ... the grass - you must stay on the paths.
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