选择题：19. One of my teeth is so___ that it is going to b

题目内容：

19. One of my teeth is so___ that it is going to be missing soon(本题1.0分)
A、 lose
B、 loose
C、 loss
D、 lost

参考答案：

31. I think it quite essential that your child ___

31. I think it quite essential that your child ___ a foreign language at school.

（）将均衡汇率定义为对实际有效汇率与其相关的基本经济变量，通过计量经济学方法建立起行为关系而最终得到的汇率估计值。 A.基本要素均衡汇率理论B.均衡实际汇

82. Many a white-collar worker___to return to the easy days of university or col

40. The writer has listed why cloning is not feasible to be ___on humans.(本题1.0分