Here are the sentences completed with the correct forms of the phrasal verbs:

1. I’m going crazy! I can’t **deal with** so much confusion!
2. Why don't you **look up** this word in the dictionary?
3. I think she **set up** the quarrel with her close friend.
4. The two countries agreed to **set up** full diplomatic relations.
5. Mike had to **give up** gymnastics because of his injury.
6. It's difficult to **keep up with** changes in technology.
7. When you're tired and under stress, it's important to look after yourself and find ways to **get over** it.
8. Six people applied for the job, but four of them were **turned down**.

Feel free to ask if you need further clarification or help!