From space, the earth looks blue. This is ____about seventy-one percent of its surface is covered by water.
| A． why | B． how | C． because | D． whether |
The books are easily ___________ to the readers as all the shelves are open.
| A．relevant | B．accessible | C．acceptable | D．sensitive |
All these changes will lead to ____ stronger and more Powerful China, ____ country that can help enrich the planet.
| A．a ; a | B．a : the | C．the :a | D．the : the |
The question came up at the meeting ______ we had enough money for our research.
| A．whether | B．that | C．which | D．what |
Her husband and she are now at work on a new dictionary ______ next year.
| A．to publish | B．being published | C．published | D．to be published |
Only in recent years ______ to realize the importance of wildlife conservation.
| A．do people begin | B．have people begun |
| C．people have begun | D．people begin |