Do you know ________ her mobile phone? — No, I think it cost her around 4000 yuan.

We don’t know _________. She is new here.

Do you prefer grapes _____ bananas?— I prefer grapes _____ bananas. [ ]

Let’s vote _____ Betty, because she often helps people _____ need.[ ]

Afer class, I play ping-pong with my classmates.