did
- .He said that not until the heavy snow blocked the express ______ how serious the weather was.
- ．Who did the manager of the company ________ the report?
- “Did you have any difficulty in yesterday’s homework?”—“No, in fact I found _____.”
- I wondered_____that made him so upset.
- Only when the meeting began _______ that he had left his papers at his office.
- The news that scientists so far haven’t found out the cause of bird flu discouraged some WHO officials,________?
- Not until I came home last night ________ to bed.
- Only when_______senior high school________to show a great interest in poems.
- Did you see who the driver was?— No, so quickly_____that I couldn’t get a good look at his face.
- Only when he failed ______ the stress he was under.