S-11：skate on thin ice 情况危急
A:The New Year is coming. Is the final examination approaching, Bob?
A:快到新年了！鲍勃，也该期末考试了吧？
B:Oh, yeah. We will have winter holiday.
B：是的，妈妈，我们就要放寒假了。
A:How are you getting along with your studies?
A：你学习进展怎么样？
B:Don't worry, mum. I will study hard tomorrow.
B：妈妈，别担心，我明天会好好学习的。
A:But you were playing video games all afternoon. You're skating on thin ice.
A:可一个下午你都在玩游戏，你现在的情况很危急呀。
