不行。在非限制性定語從句，只有關系代詞which,as可以指代一句話。 that在下面的句型中可以指代一句話。 If you want to order a double room,that need another twenty dollars. that指代前面那句話的意思，做need的主語。這是個條件狀語從句。

可以 當後面的定語從句有多個時，後面的必須and +that

and that 表示一種“承前啟後的”作用，意思“而且，並且”

如：

It seems to me now that he sighedand thatI tittered to hide my embarrassment.
在我現在看來，他那時似乎在歎氣，而我吃吃地笑是在隱藏我的尷尬。

The computer can even type letters you dictate to it,and that, in any language you choose.
計算機甚至能把你口授給它的信件打出來，而且能用你所選擇

that 在這裡的用法是“用於強調先前表達過的詞或短語的意思”，其前的 and 用於承前啟後。and that 在此可翻譯成“而且”。

如：

He was fed up, and that to a great degree.  他已吃飽，而且相當撐。

and that 的習慣用法：

She came at midnight, and that alone. (and that＝and she came at midnight)

He studied music for many years, and that under a well-known musician. (and that＝and he studied music for many years)

The boy has lost a book, and that the one he bought only the other day. (and that＝and he has lost)

可以，但會把句子結構變得很呆板，沒有語言的美感 可以 具體還是要看你的句子內容 答案：可以