—How long can I keep the books? —_____
| A．Three. | B．Three times. | C．Three days. | D．Very often. |
My cousin gave up the chance of working abroad and returned to his hometown.
| A．opportunity | B．challenge |
| C．experience | D．change |
Maria called him three times yesterday, but nobody answered.
| A．visited | B．told |
| C．phoned | D．met |
—Do you know __________ in China tomorrow?
—In the morning.
| A．when she arrives | B．when does she arrive |
| C．when she will arrive | D．when will she arrive |
The lovely postcards __________ to Ann last week.
| A．send | B．sent |
| C．were sent | D．have sent |
They __________ each other for more than 5 years.
| A．know | B．knew |
| C．will know | D．have known |