Question

they admitted that they had forgotten what they had learned the week before and wouldn't be able to do the test​

Answer 1

Answer:

If you want to punctuate it then it is

Explanation:

They admitted that they had forgotten what they had learned the week before and wouldn't be able to do test.

If you are arranging it into a correct order than the answer is

They won't be able to do the test because they admitted that they had forgotten what they had learned the week before.