He met Rachel at her college graduation ceremony in 2008, ________ he was later to marry.
I woke up with ____bad headache, yet by ______evening the pain had gone.
—The trip shouldn’t take more than an hour. — ______It is at least two hours.
Can you make sure ______ the gold ring?
It is careless _______ such a mistake.
The teacher said that the sun ________ in the east and ________ in the west.