这里回答仍用a：There's (a) clean cup in the cupboard.因为答句强调的是：厨里有个（一个）干净的杯子.是强调数量：有一个；而不是描述那个（the cup）杯子.跟一般的第二次提到用the的用法有区别.

希望对你有帮助那这里There's (a)可以换成There's (the)吗？Friend:Is there (an) electric cooker in your kitchen?You:Yes,there is.There's ()[填a还是the呢？？怎么判断？？]electric cooker in our kitchen.It's in (the) middle of (the) room.

不可以，理由前面已经讲了：这里是强调数量：一个，而不是特指：那个

Friend:Is there (an) electric cooker in your kitchen?
You:Yes,there is.There's (one). 这里一般填one，作代词：是的，有一个（电炉子）。

这里的答句一般会是以下两种情况：

1. Yes, there is. There's (one).

2. Yes, there is. (The) electric cooker is in our kitchen. It's in (the) middle of (the) room.

(The) electric cooker 【少动词了：is】 in our kitchen.It's in (the) middle of (the) room.后面两格都用the

或者：(The) electric cooker in our kitchen is in (the) middle of (the) room.

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