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题目内容
（河北工程技术学院大学英语1）
16、(单选、2.5分)
He spent __________collecting materials for his article.
A、a half year
B、half year
C、half a year
D、half of a year
He spent __________collecting materials for his article.
A、a half year
B、half year
C、half a year
D、half of a year
参考答案
