Teachers often use simple examples to _______ language points that are _______ the students.
The officials soon realized that, ____, things would get worse.
____ born in Toronto, Canada, the author is most famous for the stories about New York City.
---Do you doubt ___ she has passed the exam? ---I’m not doubtful at all ___she has passed the exams.
Can you show me a case ____ the professor mentioned yesterday?
“Never for a second,” the boy says, “____ that my father would come to my rescue.”