The professor gave ________ on how to do a scientific research well. A. two pieces of suggestions B....
2022-10-16 02:12:03 53次 2018秋（安徽）人教版九年级英语同步测试：unit 10 6 第五课时 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
The professor gave ________ on how to do a scientific research well.
A. two pieces of suggestions
B. two pieces of advices
C. two suggestions
D. two advice
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