We should make a careful study of his____.A．useful teaching experiencesB．useful
题型：不详难度：来源：
We should make a careful study of his____.| A．useful teaching experiences | B．useful teaching experience | | C．usefully teaching experiences | D．usefully teaching experience |
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答案
| B |
解析
| experience作“经验”解时，为不可数名词；用作可数名词时，意为“经历”。 |
举一反三
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