----This returned Chinese scholar has become one of the top experts in this field.----Yes,I know him very well.He_________in Africa with animals for eight years.
_____, the great mother, in order to save her sick child, kept waiting for four hours in the heavy snow.
After Peter died, George ______________ the story of their friendship in a book.
The _____ language used in most international organizations is English.
--- Hello! Is Mr. John in the office? --- Yes. But I’m sorry. He is busy _________ and can’t speak to you.
As a young man, there was __________ time __________ I hated to go to school .