情景交际。将正确答案的序号填入题前括号中。

1. 如果白灵见到约翰说：“Hi, John, how are you?”那么约翰应回答：[ ]

A. Fine, thank you.

B. Hi, Bai Ling, how are you?

C. Nice to meet you.

2. Zip说他喜欢蓝色，你也喜欢，应说：[ ]

A. Nice to meet you, too.

B. Me too.

C. I like blue.

3. 吴一凡举着黑牌子说：“穿黑衣服的同学请站起来。”你穿黑色衣服你应该：[ ]

A. Stand up.

B. Sit down.

C. Turn around.

血液常用的保存液ACD和CPD加用一种物质就成为ACDA和CPDA，这种物质是（）。

A.枸橼酸

B.枸橼酸钠

C.磷酸二氢钠

D.腺嘌呤

E.葡萄糖