I have a lot of readings __________ be-fore the end of this term.
He is a man of great knowledge, ___much can be learned.
Now we can fly to Tokyo. There was a time ________ we had to take a boat.
The world ______ is made up of matter.
The reason _______ he gives for not coming is that his mother is ill.
If Bob’s wife doesn’t agree to sign the papers, _______.