So difficult ________ it to live in an English-speaking country that I determine to learn English well.
Recently some studies have found that learning ___________ second language can lead to __________ increase in one’s brain power.
---Are you being_____, sir? ---No, I just want to buy a cellphone.
The old man had a son and a daughter, ____ treated him well, _____ greatly disappointed him.
---Will this fish_____ until tomorrow? ---Only if you put it in the fridge.
Uncle Wang is a genius cook and we_____ never get enough of his cookies.