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What do we breathe out of our mouths?

• blood

• oxygen

• carbon dioxide

What carries oxygen throughout our body?

• blood

• veins

• heart

Each s _ s t _ m in our body has many parts working together.

Complete the sentence.

The major parts of the respiratory system are trachea, the ______, and the diaphragm.

• lungs

• blood

• bones

Complete the sentence.

The major parts of the circulatory system are the heart, the arteries, the veins, the capillaries, and the _________.

• lungs

• blood

• trachea

Use used to ________ an action that happened often in the past, but not now.

• before

• after

Complete the sentence.

I / live in a flat when I was a child.

Complete the sentence.

She / love eating chocolate, but now she hates it.

Complete the sentence.

I / play tennis when I was at school.

Complete the sentence.

They both / have short hair.