A 15%—20% drop in body water can cause the blood system to fail.
查看答案
【B7】
A. each
B. both
C. all
Water is a kind of chemical substance.
A. True
B. False
【B1】
A. it
B. She
C. That
听力原文：M: I can come to your house in half an hour.
W: So you will be here at 10:15.
Q: What time is it now？
(7)
A. 9:45.
B. 10:15
C. 9:15
D. 10:45
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