_________ the wind and the sun, the color on the board gradually ran.
| A．Being exposed to | B．Having exposed | C．Exposing | D．Exposed to |
Eric was well prepared for the computer test so that he could be positive about passing it on his first________.
| A．intention | B．attempt | C．purpose | D．desire |
The dead rate is _____ pigs and recovery usually ______ within 7-10 days.
A low in; occurs B. rich in;happens
C. high in; came about D. poor in;took place
_____ three influenza type A virus subtypes(子类型) have been found in pigs.
| A．By far | B．As far as | C．So far | D．Till far |
_____, experts point out that students can easily fail at starting their business because of a lack of preparations.
| A．But | B．However | C．while | D．though |
It has always been the _____ of our government to encourage graduates to start their business.
| A．plan | B．campaign | C．procedure | D．policy |