"I have a Chinese test tomorrow."
It's absolutely frustrating how few answers this course will accept, especially in this module.
明天我又汉语考试 should be accepted, as well as numerous other variations.
The first is incorrect and the second is grammatically correct, 一次 is one time.
The options for answering this in English are neither common nor even in the hints for the Chinese sentence. This thing needs a lot of work