情景交际: 用适当的单词、短语或句子完成对话。  

A: Let's make a beef sandwich.

B: Good idea!               1                ?

A: Well, first cut the bread into two slices and put some butter on one slice.

B:              2                 ?

A: A teaspoon of butter. Next cut up some tomatoes.

B:              3                 tomatoes?

A: Only one is enough. Add it to the bread.

B: And                4              ?

A: Put some beef slices on the bread.

B: Is that OK?

A:              5                .Put some relish on the beef. Finally, put another slice of bread on the top.

B: Great!