A:Do you offer paper bags?

甲:你们提供纸袋吗？

B:Yes. But it is not free. It costs one yuan.

乙:是的。但是不是免费的，每个一元。

A:Is it big enough Look, I bought 10 books.

甲:够大吗？你看，我买了 10本书。

B:Yes. It's big enough to contain your books乙:是的。能装得下您的书。

A:I'd like to buy one.

甲:我买一个。

经典句型:I'd like a plastic please. 我要一个塑料袋。

A:I'd like a plastic please.

甲:我要一个塑料袋。

B:A big one or a small one?

乙:大的还是小的？

A:A big one. How much is it?

甲:要大的。多少钱？

B:30 fen.

乙:3角钱一个。

句型讲解：

It is not free.不是免费的。free在这里表示“免费的”。如:There is a free lecture noon.今天下午礼堂有免费的讲座。