from the moon, our earth with water seventy percent of its surface, appears a blue ball.
| A．Seen; covered | B．Seen; covering |
| C．To see; covering | D．Seeing; covered |
27. He often thinks of ______ he can do more for his country, so he is highly spoken of by the people throughout the country.
| A．what | B．that | C．how | D．Whatever |
26. Word has come ______ the Chinese football team has failed again, _______ makes many football fans frustrated.
| A．that; that | B．what; what | C．which; that | D．that; which |
25. ______practice makes perfect is true.
| A．What; | B．That | C．Which | D．If |
24. The reason ______ he is absent from class is _______ he has caught a bad cold.
| A．why; because | B．that; what | C．for which；because | D．why; that |
23. I asked him ______ that he managed to get the information.
| A．it was where | B．what it was | C．why was it | D．how it was |