Some help with some prepositions！

[jacki]

I'm in the process of reviewing for my midterms, and I've found that prepositions are giving me a headache. I understand them when I see them being used in sentences, but when I have to plop a preposition down in a blank it gets a little difficult.

I think all my answers here are correct, but could someone double check for me? And there are a couple I have further questions on that I will explain when I get to them

My options for filling in these blanks are: 对，从，凭，自，给，向，趁，由，与

1。凭我的观察，他是一个很有艺术才能的人。

2。那个工作对你不太合适。（Were I writing this sentence, I would've just written ‘那个工作不太适合你’， but eh. I almost answered ‘与’ for this, but that didn't seem right, but 对 still feels weird to me for some reason.)

3。他把自己的朋友推荐给了那家用人单位。

4。我的话是发自内心的，请你相信我。（This was a complete guess, does 发自 mean 'sent from' like 来自 means 'come from'?)

5。从他的能力来看，他肯定能做好那件事情。

6。老师讲课一定要从学生的实际情况出发。

7。你只要诚恳地向他道歉，他一定会原谅你。

8。今天晚上的招待会凭请柬入场。

9。趁考试还没开始，我又把词语看了一遍。

10。雨已经由大变小了，很快就会雨过天晴。（My textbook, which this exercise is in, gives me six meaning for 由 ⋯⋯ 承担谋事，事物的形成，说明原因，凭借／根据，方式，and 起点，and to me this doesn't seem like any of those. Can 从 also be used here?)

11。我们与那家公司签订了贸易合同。（I know it's not one of my options, but can 跟 also be used here as well?)

12。这个消息是由你告诉他吧。

Thanks for the help!!

[Xjian0104]

2. I think you can use "对" as " to" " for"

4. “发自内心” is an idomedic expression and 发 is related to opinion，message, order.

10. I feel 从 is always contains a meaning of emphasize what is not need here

11. That's ok. 跟 is used more frequently in oral language

[rivercao]

5。从他的能力来看，他肯定能做好那件事情

。

This is a bit weird but still it's OK. I would choose:

凭他的能力来看，他肯定能做好那件事情。

The best way to say it can be:

以他的能力，那件事情肯定会完成的很好。

But there is no option on the preposition "以".