—My son is lost . Have you seen a boy passing by here?—I saw boy hidden behind tree over there . You may go and have a look.
____ 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.”
_____________ the sun for too much time will do great harm to your skin.