Indirect Speech Problem

Hi all,

I had encountered a problem in exercise about Indirect Speech. The exercise questions are shown below with answers known except question 14 which is unsolved.

Does anyone know the possible answer for question 14?

Thank you.

"
Read the actual words of the conversation, then fill the blanks in the reported conversation with TWO suitable words (put ONE space between the words). Be careful of subject-verb order in indirect questions.

I have a problem.
He said that 1.----- a problem.

What is the problem about?
I asked him what the problem 2.-----.

I have had the problem for a long time.
He said that he 3.----- the problem for a long time.

Exactly how long have you had the problem?
I inquired how long 4.----- had the problem.

I first had the problem two years ago.
He answered that he had 5.----- the problem two years earlier.

What can I do about it?
I wondered what 6.----- do about it.

Please help me.
He asked 7.----- help him.

I will help you if I can.
I promised that 8.----- help him if 9.-----.

First you must tell me what it is.
I told him that first he had to tell me what 10.-----.

I can’t remember.
He admitted that he 11.----- remember.

I want to know what you mean!
I demanded 12.----- what 13.-----.

That is another problem: I’ve forgotten the first problem.
He explained that a second problem 14.----- he 15.----- the first problem.

I’m very sorry – I’ve wasted your time.
He apologised 16.----- my time.

Answers:
1. he had
2. was about
3. had had
4. he had
5. first had
6. I could
7. me to
8. I would
9. I could
10. it was
11. could not
12. to know
13. he meant
14.
15. had forgotten
16. for wasting