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Tom was a boy,he was always thinking out new idea这句话中间的空填cute clever pretty还是smartthink为什么要加ing

题目详情
Tom was a boy,he was always thinking out new idea这句话中间的空填cute clever pretty还是smart
think为什么要加ing
▼优质解答
答案和解析
Smart.
thing加ing因为前面用了alway用进行时态表示一种情感.