– You must have your work done within 2 days.
-- Finishing a task in such short time is a (an) __________.
| A．conclusion | B．challenge | C．explanation | D．approach |
I really appreciateto drive me home，but I am afraid that I have to finish my work first now.
| A．you to offer | B．it you offer |
| C．your offering | D．this you are offering |
When we got there after the accident，we were told that the injuredto the nearest hospital.
| A．were sent | B．had been sent |
| C．have been sent | D．are sending |
with the medicine shipped from China，the patient got fully recovered two days later.
| A．Being treated | B．Treated | C．To treat | D．Treating |
As birthplace of Huaxia civilization，Xi' an is city with a long history and abundant cultural relics.
| A．the；a | B．a；a | C．/;a | D．the；／ |
If you have any difficulty ____ how to skate, you can turn to Jacky.
| A．learned | B．to learn | C．learning | D．learn |