_阜陽成考網(wǎng)

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

The children and their parents had great fun _______games in the park.（）

• A、playing

• B、play

• C、played

• D、toplay

51.