用 look into 和 run across 和 smile at 和 think about 各造两个句子

1,I will look into Guangzhou next month./ What can you see if you look into the river?
2,I ran across my English teacher in the street yesterday./ It is common to run across our friends when we go out.
3,What are you thinking about?/ What I am thinking about is how to solve the problem.
再问： 亲 smile at 呢
再答： 呵呵，不好意思，忘了。 4，Smile at me,please./ It's polite to smile at others when you are talking. 【俊狼猎英】团队为您解答。