根据下面的对话情景，在每个空白处填上一个适当的词或句子，使对话的意思连续、完整。

A: Jim, what are you doing in the kitchen?

B: ____________________

A: Noodles? They are my ___________food. What do we need to cook noodles?

B: We need one tomato, one onion, some beef and noodles.

A: __________________

B: We also need lettuce (生菜), salt and relish (佐料).

A: OK! We've got them. Can you tell me ___________?

B: Sure. We can boil noodles first and then cook all things together.

A: Great. Let's begin.

(A few minutes later)

B: Oh, the noodles _________ great!

A: They must be delicious. Let's eat together.

如图所示各事例中的物体，使用时为了增大压强的是（　　）

A．

拖拉机的履带

B．

    切蛋器的钢丝

C．

   书包的背带

D．

     铁轨的路枕