Tom owns ______ larger collection of ______ books than any other student in our class.
29.His humorous closing speech was a welcome addition to the ______dull meeting.
28.The government had hoped to draw as much attention as possible to this problem but it didn't ______ that way.
27.The students wonder______ good the course will do to their future jobs.
26.He never regretted the anxious hours he had had ______ for the missing papers.
25.At present, the butter factory is still polluting the river though it ______ to stop.