在一个暗箱里放有若干个除颜色外其它完全相同的球，其中红球有4个。次将球搅拌均匀后，任意摸出一个球记下颜色再放回暗箱。过大量重复摸球实验后发现，摸到红球的频率稳定在20%，那么可以推算出红球以外的球数大约是 [ ]

A．20

B．16

C．8

D．4

Read and write. (根据答句写问句)  

1. A: ______________________________________

    B: My birthday is in February.

2. A: ______________________________________

    B: It's October 1st.

3. A:_______________________________________

    B: I'm sending an e-card.

4. A: ______________________________________

    B: I play football at 3:30 in the afternoon.

5. A: ______________________________________

    B: Hold on, please. Mom, it's your phone call..