句型转换。

1. I spent the Chinese New Year with the Zhang family. (就划线部分提问)

    ___________________________________________________________

2. Mrs. Zhang is cleaning the house right now. (就划线部分提问)

    ___________________________________________________________

3. When they are preparing for New Year, there are many special traditions. (改为同义句)

    When they are _________ _________ ________ New Year, there're many special traditions.

4. I'm having a great time here in Beijing. (就划线部分提问)

    ___________________________________________________________

5. Mr. Zhang made some special cakes from rice flour. (就划线部分提问)

    ___________________________________________________________

关于人绒毛膜促性腺激素，错误的叙述是

A．hCG是由子宫的胎盘滋养层细胞分泌的一种糖蛋白激素

B．从受精后的第6天，开始分泌hCG

C．孕妇血清hCG通常从受精后的第8～10周可达高峰

D．hCG分泌后直接进入胎血循环

E．血清中的hCG略高于尿液