考博考试

【单选题】 In the flint decades of the twentieth century, the individual gem could not be seen, but could be worked with fruitfully.
A．blindly
B．completely
C．productively
D．carefully

网考网参考答案：C
网考网解析：
blindly盲目地，摸索地；completely十分地，完全地；productively有结果地，有成果地； carefully小心地，谨慎地；fruitfully产量多地，肥沃地。 查看试题解析出处>>