Quiz về nhà 19.7

When you ride a bike, you should ______ your body to turn safely.

• A. direction

• B. backwards

• C. lean

• D. gravity

The car is moving in the wrong ______, so we need to turn around.

(nghĩa của "wrong" là "sai")

• A. direction

• B. lean

• C. friction

• D. inertia

The cat ran ______ the dog because it was scared.

• A. towards

• B. backwards

• C. lean

• D. away from

She walked ______ the school gate because she wanted to go inside.

• A. away from

• B. towards

• C. backwards

• D. lean

He took a step ______ and almost fell.

• A. backwards

• B. towards

• C. lean

• D. direction

______ keeps us on the ground and makes things fall down.

• A. Friction

• B. Gravity

• C. Inertia

• D. Direction

______ helps you stop when you ride a bike and use the brakes.

• A. Gravity

• B. Inertia

• C. Friction

• D. Backwards

______ keeps the planets moving around the Sun.

• A. Inertia

• B. Gravity

• C. Friction

• D. Centripetal force

______ you practice, the better you will speak English.

• A. The faster

• B. The better

• C. The more

• D. The best

A bicycle is a vehicle ______ has two wheels.

• A. what

• B. who

• C. which

• D. where