Paying attention to which verbs change their spelling before adding s in the third person singular

3. Paying attention to which verbs change their spelling before adding s in the third person singular, fill in the blanks with the Simple Present of the verbs shown in brackets. For example:
He always _______ promptly. (to reply)
He always replies promptly.

She _____ little. (to say)
She says little.

They _____ bridge once a week. (to play)
They play bridge once a week.

1. He __________ it. (to deny)
2. They __________ to be on time. (to try)
3. It _________ to be careful. (to pay)
4. She __________ hard. (to study)
5. You __________ good manners. (to display)
6. He always __________ himself. (to enjoy)
7. She __________ to Ireland once a year. (to fly)
8. We __________ five people. (to employ)
9. He __________ his friends. (to accompany)
10. She __________ chocolate chip cookies every week. (to buy)