-- Hi, Grace, you look tired.-- I'm tired. I ____________________ on my homework all day.
The chairman thought ____ necessary to invite Professor Smith to speak at the meeting.
It is not expected ____ he said caused so much discussion at the meeting.
He is always ready to help others. That’s one of his _____.
Please remind me in case I ______ forget.
The bridge ____ in the 1800’s was the oldest building in this village.