$1$. Only when Tony was half way through the exercise did he realize how difficult it was.

$2$. Your failure to obey the rules may make you disqualified from the competition

$3$. She flatly "Nothing will persuade me to sleep in that haunted house"

$4$. Impressive as the building was, it wasn't to my taste.

$5$. Whoever you ask in this office will say the same as I did.

$6$. Many's the time that our parents heard my brother use those words

$7$. It makes no difference to me which chemical you put into the mixture first

$8$. The students found the demanding timetable exhausting

$9$. If it had not been for the money from the sponsors, we could not have conducted a successful show

$10$. As far as payment is concerned, most major credit cards are acceptable at our stores.

=>

1. Not until he was halfway through it did Tom realize how hard the exercise would be.

2. Your failure to obey the rules may cause your disqualification from the competition.

3. She flatly refused to sleep in that haunted house.

4. Impressive as the building was, it wasn't to my taste.

5. Whoever you ask in this office will say the same as I did.

6. Many's the time that our parents heard my brother use those words.

7. It makes no difference which chemical you put into the mixture first.

8. The students found the demanding timetable utterly exhausting.

9. If it hadn't been for the money from the sponsors, we couldn't have conducted a successful show. / If it hadn't had the money from the sponsors, we couldn't have conducted a successful show. 

10. As far as payment is concerned, most major credit cards are acceptable at our stores.