There was no clock so I didn't know what time it was还是 so I didn't know what the time was.There was no clock in the room so I didn't know what time it was.还是There was no clock in the room so I didn't know what the time was.

There was no clock so I didn't know what time it was还是 so I didn't know what the time was.
There was no clock in the room so I didn't know what time it was.
还是There was no clock in the room so I didn't know what the time was.

都可以.
问时间的两个基本句型是：What is the time?和 What time is it?
改作宾语从句并采用过去时时,就分别变成了：what the time was 和 what time it was

There was no clock in the room so I didn't know what time it was.