2. 外语
  3. Final grades should be______on plenty of good evidence.

Final grades should be______on plenty of good evidence.

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问题 Final grades should be______on plenty of good evidence.
选项 A、developed
B、given
C、based
D、concentrated
答案C
解析 base(on)vt．把……建立在……的基础上(如：One should base one’s opinions on facts．This book is based on a true story．Teaching is an art based on a science．)。develop vt．发展，形成：开发，研制。concentrate(on)vt．集中；聚集；浓缩。
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