Selecting a mobile phone for personal use is not an easy task because technology ________ so rapidly.
| A．is changing | B．has changed |
| C．will have changed | D．will change |
—Do you know the Water Cube at all?
—No, this is the first time I ________ here.
| A．have been | B．came |
| C．was | D．am going |
A kind of newlymade shoes, if put into the market, ________ large orders because the heels can switch from 9 to 4 centimeters.
| A．meets | B．will meet |
| C．has met | D．met |
I had meant to meet you at the airport this morning but I was too busy for I ________ a report.
| A．wrote | B．was writing |
| C．have written | D．had written |
All the preparations for the task ________， and we're ready to start.
| A．completed | B．have completed |
| C．will be completed | D．have been completed |
—Do you know our school at all?
—No, this is the first time I ________ here.
| A．was | B．have been |
| C．came | D．am coming |