She used to _____ a bus to school, but now she is used to _____ to school.

Before the conference, a new problem came up __________ could speak on behalf of our group

The trouble with Bill was that he never had a ___________ aim in life. [ ]

Are you good at history， Rose—_______. But I will try to study it well this term.

His writing is so neat that it’s easy for the teacher to make out ______ he is trying to express.