_______they visited the Science Museum, they showed great interest in everything they saw.A For the first time B. At firstC. At the first time D. The first time
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.