If you need any help, please call me.
HESITATE
If you need any help .................... me a call.
I got started on the new venture at once.
TIME
I lost .................... on the new venture.
Do you have any idea why Mark has sold his sports car?
LIGHT
Can you .................... the reason why Mark has sold his sports car?
You must never leave the workplace without letting the team leader know.
ACCOUNT
On .................... leave the workplace without letting the team leader know.
You can come to the party or not - I don't really care.
ATTEND
Whether or not you .................... really matter to me.
There is no denying that Jack is an easy-going person.
HAND
You .................... Jack, he is an easy-going person.