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In those days, our _________ concern was to provide people who were stopped by the snow storm with food and health care.

A. normal B. constant

C. permanent D. primary

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Title:1.of a Tree

General information

Old trees

Items

Facts

Items

Facts

Where can rings be seen

On the 2.of a trunk

The tubes in the centre of the tree

Don't carry water

The3.of rings

Helps us know about its age

The walls of the tubes

Become

4.

Form 5.

6.light?colored rings

Show the tree grows quickly

Narrow7.

rings

Mean the tree grows slowly

Microscopic tubes

Function

Carry8.

Features

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Narrow and stuck together when growing 10.

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