Hanoi declared that it ______by fast-spreading H1V1, which ____other countries nearby.
The American Civil War lasted four yearsthe North won in the end.
How long is it ______ we last spent the holiday in the country together?
The head of the company promised to deal with matters of this sort ____ he returned to his office.
He will have learnt English for eight years by the time he _____ from the university next year.
The airline said the two flights to Shanghai were stopped ______ passengers.