Ⅰ.单句填空
1.We will know more about our history by __________cultural understanding.
2.The number of medical schools reached 18 in the early 1990s and _______(remain) around that level since.
3. We are confident that the environment will be improved by our_______(far) efforts to reduce pollution.
4.China's image is improving steadily,with more countries________ (recognize) its role in international affairs.
