题目内容
scientists have done a lot of research on A (H1N1) flu, there are still some cases for further study.
[ ]
A. As
B. One
C. If
D. Although
B. One
C. If
D. Although
D
练习册系列答案
相关题目
根据句意,选用方框内所给词的适当形式填空。
|
east sixty health know discuss |
1. After a ____________, both sides reached a final agreement.
2. Japan is to the ____________ part of China.
3. To live ____________, you should change your lifestyle and diets.
4. Scientists are always trying to discover the ___________ world to human beings.
5. Audrey Hepburn, who died in her __________, devoted all her life to charity.