51.

Why does the peach farmer start to plant almonds?（）

• A、There is a greater demand for almonds

• B、Growing almonds takes much less land.

• C、A machine can help get almonds off the trees

• D、Almonds will fall on the ground when ripe

Before you leave the classroom, _______all the lights.

• A、turnup

• B、turnover

• C、turnto

• D、turnoff