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21£®A fire        in the shoe factory last night but was put out soon.
A£®came about B£®came out C£®broke up D£®broke out
22£®Mr. Alexander doesn’t just write        ,in fact, writing is his bread and butter.
A£®for a living B£®for fun C£®for business D£®for sale
23£®Miss Zhou worked late into the night,        the final exam paper.
A£®preparing B£®prepared for C£®to prepare D£®to be prepared for