4 Fill in the correct preposition.
a. My cousin works ___Vodafone, which is a wireless communication company.
b. I have asked my classmate to meet tomorrow to work ___ our Chemistry project.
c. Henry works ___a journalist.
d. My neighbor works ___ a factory. They produce furniture.
e. He works ___ dangerous substances.
f. I plan on working ___ sales. I want to become a sales representative.
g. I met a person who works ___ Unilever.
h. My mom is working ___ a written translation which is due tomorrow ​