If you describe someone or their work as ______, you mean that they are very imaginative and have new ideas.

Where is your mother， Jack—She is busy ____ a cake. I will have a birthday party tonight.

I don’t think he will pass the exam，________？[ ]

I tried to call you last night, but I couldn’t ______.

I hope we can do business together, and I’m looking forward with great interest _________ your call.