下列物质中单位重量提供热量最多的是
A．葡萄糖
B．蛋白质
C．果糖
D．脂肪
E．膳食纤维
参考答案：D
—I want a _______ to cut the big apple. Could you pass me one?
—Certainly, here you are. [ ]
A. fork
B. knife
C. spoon
John received an invitation to dinner,and with his work_____ ,he gladly accepted it.
A．finished
B．finishing
C．having finished
D．was finished
