The barrier of language keeps many scientists in prolonged ignorance of work of

游客2023-11-23 80

问题 The barrier of language keeps many scientists in prolonged ignorance of work of immediate importance to them ______at present in many countries.

选项 A、doing
B、to be done
C、having done
D、being done

答案 D

解析此题考查非谓语动词的用法，根据题意的逻辑被动关系进行判断。

转载请注明原文地址:http://tihaiku.com/zcyy/3211088.html

相关试题推荐

随机试题

最新回复(0)

Scientistsfordecadeshaveclashedoverwhetherevolutiontakesplacegrad