题目内容

Most of the atoms are ...

A. tiny cubes.
B. not used.
C. empty space.

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You probably have mites in your ...

A. hair.
B. ears.
C. eyelashes.

Mites are very small creatures that are about ...

A. 3 millimetres long.
B. a third of a millimetre long.
C. 0.03 millimetres long.

Mites eat ...

A. dead skin.
B. your eyelashes.
C. tiny insects.

Only one tenth of the cells in your body are really you. The rest are ____.