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Book 4 Unit 9 Review Quiz
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What ___ when things rub together?
happens
Oops!
Okay!
The cat is ___.
Oops!
Okay!
The ___ you study, the ___ your grades.
more/harder, better
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Okay!
A swing can move ___ and backward.
forward
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Okay!
PE is a class which ____.
we take at school.
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Okay!
Oops!
Okay!
What ___ shall we walk? Let's go north!
diirection
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Okay!
Can you help me ___ my phone to the internet?
connect
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Okay!
An airplane is a kind of transport which ___
flies in the air.
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Okay!
Those ___ are really talented. Look how fast they are moving on the ice.
skaters
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Okay!
Gravity, friction and inertia are all ___.
forces
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Okay!
Gravity is a force ___ pulls things down.
which
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Don't ___ on me, you're too heavy!
lean
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Okay!
The ___ you run, the more tired you feel.
faster/ further
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Okay!
Oh no, the bear is coming ___ us!
toward
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Okay!
On a rollercoaster, ___ is a force which helps you stop.
friction
Oops!
Okay!
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