The sale of the company's new product is good. It has ________ two million dollars so far.
| A．carried on | B．kept up |
| C．brought in | D．consisted of |
If you are travelingthe customs are really foreign to your own，please do as the Romans do.
| A．in which | B．what | C．when | D．where |
The American Civil War lasted four yearsthe North won in the end.
| A．after | B．before |
| C．when | D．then |
How long is it ______ we last spent the holiday in the country together?
| A．until | B．before | C．that | D．since |
The head of the company promised to deal with matters of this sort ____ he returned to his office.
| A．the moment | B．while |
| C．by the time | D．until |
He will have learnt English for eight years by the time he _____ from the university next year.
| A．will graduate | B．graduates |
| C．will have graduated | D．is to graduate |