按要求改写句子。

1. We had a big dinner there yesterday. (对画线部分提问)

    ____________________________________________________?

2. I went around the city of Warsaw last Thursday. (同上) 

   ____________________________________________________？

3. Laura, ice skating, four, started, was, when, she  (连词成句)

   ____________________________________________________. 

4. I felt like some bread this morning. (对画线部分提问)

   ____________________________________________________?

5. She became a skating champion when she was ten. (改为否定句) 

   ____________________________________________________.

如图所示，两个直立气缸由管道相通。具有一定质量的活塞a、b用钢性杆固连，可在气缸内无摩擦地移动。缸内及管中封有一定质量的气体。整个系统处于平衡状态。大气压强不变。现令缸内气体的温度缓慢升高一点，则系统再次达到平衡状态时（ ）

A．活塞向下移动了一点，缸内气体压强不变

B．活塞向下移动了一点，缸内气体压强增大

C．活塞向上移动了一点，缸内气体压强不变

D．活塞的位置没有改变，缸内气体压强增大