At one time, she is fine, ________ at another, she is abnormal.

— Was it not until last week ______ he decided to give up smoking?— No. He began _____ he saw the new film last month. 

. I was glad to meet Jenny again,       I didn't want to spend all day with her.

 Those who know ____ it was that wrote “ A Tale of Two Cities”, raise your hands.

I have no idea ______ it is that makes him puzzled.