题目内容

How was the weather 10 years ago if the tenth ring is close to the eleventh one？

A. It was good.
B. It was bad.
C. We don't know.

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【B3】

A. is
B. as
C. like

What is the text about？

A. What is a tree ring.
B. What can a tree ring do.
C. How to study a tree ring.

【B5】

A. hundred
B. hundreds
C. thousand

【B2】

A. was
B. is
C. had been