When it comes to using prepositions in English, one of the most common ones is "in." This small word can completely change the meaning of a sentence, so it's important to know how to use it correctly. Below are some phrases that can be completed with the preposition "in."

1. To be a part __ something
2. To succeed __ something
3. To go __ search of something
4. To know something __ experience
5. To feel nervous __ doing something
6. To be anxious __ something
7. To be __ stress
8. To feel __ control
9. To do something __ a situation
10. To lose your way __ life
11. A load __ rubbish
12. To be stressed __

Remember, more than one answer may be possible for each phrase. Practice using the preposition "in" in these contexts to improve your English language skills.