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