问题描述：
What would you say when the following happens?
1.Someone is climbing a tree.
2.You are in danger.
3.There's a lot of traffic and a little boy runs to the street to get his ball back.
4.You're afraid of mice,and you see one in the corner of the kitchen.
5.You are talking with your classmates when the school bell rings.
Time is money!
当你看到这些情况发生时或发生在你身上时，
例：1.Someone is climbing a tree.
Don't climb too high,or you will fall off.
1,2,5我都知道，重点是3,4该怎么说
1.Someone is climbing a tree.
2.You are in danger.
3.There's a lot of traffic and a little boy runs to the street to get his ball back.
4.You're afraid of mice,and you see one in the corner of the kitchen.
5.You are talking with your classmates when the school bell rings.
Time is money!
当你看到这些情况发生时或发生在你身上时，
例：1.Someone is climbing a tree.
Don't climb too high,or you will fall off.
1,2,5我都知道，重点是3,4该怎么说
问题解答：
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