水是肉中含量最多的成分。在肉中存在的方式有（）
A.自由水
B.结合水
C.水蒸气的冷凝水
D.肉汤
E.不易流动的水
参考答案：A, B, E
Jack has three sons, and both of _______ are studying in China.
A．them
B．that
C．whom
D．who
It’s raining. Please take ______ orange raincoat on the desk with you when you go out.
A. a B. an C. The
