It suddenly occurred to Anne that money couldn't ____ all that Bob had suffered in the past five years.
Work hard at your lessons, ______ you’ll fail the exams again.
He devoted all the time _____ his research .
Mr. Liu dreamed ____ a big house for his parents after they retire.
On the bus I saw a student____ I thought was your brother.
We’ll never forget the days ______ we lived in the country.