What did scientists find BIRR4 could do？
A. It could change the cold cycle.
B. It could strengthen the immune system.
C. It could only treat a cold in the first stages.
D. It could eliminate all possibilities of getting a cold.
查看答案
The main purpose of the passage is to ______.
A. criticize John Kerry for his personality
B. explain why John Kerry was defeated
C. describe the Democrats' reaction to the defeat
D. encourage the Democrats to overcome their depression
【B1】
A. Father's Day
B. Mother's Day
C. Teacher's Day
【B10】
A. thinking about
B. laughing at
C. looking for
The fact that the U.S. ranked eighth in the study of international colleges shows that______.
Americans like to claim happiness
B. American college students are active
C. America has close relationship with Slovenia
D. Americans are not as happy as they appear to be
微信支付 
支付宝支付