Without proper lessons, you could _____ a lot of bad habits when playing the piano.
Mr. Read made up his mind to devote all he had to ___ some school for poor children.
He failed in the exam, and I wonder ___ he studied hard in the school.
---I really like the record you lent me last week. ---____. ---And thank you very much for letting me keep it so long.
There fell a heavy snow last December, and this year ___ a good harvest.
The boy dived into the water and after ___ seemed to be a long time, he came up again.