Experiments of this kind___in both the U.S. and Europe well before the Second World War
It is ______ that two and two make four.
—Some more wine? —Thank you. ______. I have to drive home.
Only when _______________ home ____________ the truth.
_______in her office for nearly 20 hours, she is going home to have a rest.
Tomorrow, our ship will set sail for Macao.