At the meeting they discussed three different _______ to the study of radioactive waste.
Mark was a student at this university from 1999 to 2003, ____ , he studied very hard and was made Chairman of the Students' Union.
He is a student at Oxford University, ____for a degree in computer science.
The Smiths went to the country for the weekend as they ______ to the office.
She thought I was praising her child,_____,in fact,I was scolding him for his bad behaviors at school.
—Your mother becomes more and more forgetful. —Yes. She searched for her cellphone for a whole day last Sunday but it ______ in her coatpocket the next day.