He was waiting for me to ask him who had sent it, but I did not do so.

He knew perfectly well why she'd had to wait to ask the question.

Don't wait for the other side to ask how you do things.

He was definitely waiting for me to ask him a question.

I had been waiting to ask a certain question, and felt it was a good time.

I knew she was waiting for me to ask another question.

She had only been waiting for him to ask her, anyway.

It was as though the material were waiting for her to ask.

It's almost as though all these years they've been waiting for someone to ask.

I've known for some time he's only been waiting to ask me.