用动词的适当形式填空。

1.  All the teachers discussed the plan that they would look to see_____( carry) out in the next

     school year.

2.The stranger said something in a _____voice and the little girl was ______.( frighten)

3. The young man _____(involve)in studying paid no attention to the outside world.

4.  _____(warn) of danger in the street at night,she had to go home,with a friend ____(follow) her.

5.  When I got there, I found the bookshop _____(pull) down.  The shop owner was nowhere to be found.

如图所示，一支两端封闭的玻璃管ab倾斜放置，与水平面的夹角为θ，正中有一段水银柱，两端各封闭有一定质量的理想气体，下列情况中能使水银柱向b端移动的是（　　）

A．保持θ角不变，使玻璃管加速上升

B．沿顺时针方向缓慢转动玻璃管，使θ角变小

C．使环境的温度升高

D．绕过b端的竖直轴匀速转动