I don’t know why you are so concerned — it’s not your problem _____ .
Carl is studying ________ food science at college and hopes to open up _______meat processing factory of his own one day.
Korean culture is really popular right now. The Korean Wave is ______ Asian countries including China.
She lost her temper, ______ I decided to go back home.
Had they known what was coming next, they _____ second thoughts.
---What do you think made her mother so angry? ---______ the exam.