Be careful with such things. If you          , you’ll drop them.

The president was so absorbed in his work that not a sound ______.

There was a loud explosion in the street. ______ from the stores to see what had happened.

Only        to use this reading room. Students have another room on the second floor.

We were told not to touch the equipment in the laboratory unless ________.

Only after the woman had her own child ______how difficult it was to be a mother.

---Did you make a phone call to your parents?
---Certainly. Hardly ____ the destination (目的地) when I phoned them.

He said that not until the heavy snow blocked the express _________ how serious the weather was.

Only when he reached the tea-house ______ it was the same place he’d been in last year.

If you don’t want to choose the thinner one, ___.