The door opened and in ______ .

Only the factory ____ yesterday ____  this kind of machines.

Not until then _____ their marriage was breaking up because they had little in common.

If you don’t go there, ______．

---Can I use the telephone on the table, sir?
---Under no circumstances          to use the telephone in the office for personal affairs.

–Don’t forget to turn to me if you have any trouble.
-- ______________.

Only if you put your heart into your learning,_______.

--- He has never learned French．
---- __________．

Mr Smith never does any reading in the evening;____ .

So difficult         it to live in an English-speaking country that I determined to learn English well.