52.

What happens when ice dams break?（）

• A、They may quickly block the river.

• B、The ice covering the river may melt fast.

• C、A larger ice dam may soon be formed.

• D、The areas down the river maybe flooded

How did Jimmy's classmates feel when they saw the things in his box?（）

• A、Disappointed.

• B、Surprised

• C、Anxious.

• D、Uneasy.