They urged that the library--- open during the vacation.

They urged that the library___ open during the vacation 。urged 强烈要求must 必须 ,语气最为强烈,符合语境 ,所以选A We ____ on this project for four hours。 Let’s have a rest。选项:a、are working b、 have been working c、 worked d、 had worked 我选择B选项,我不知道为什么错了。老师请答疑,谢谢! have been doing 是现在完成进行时, 我也选B ——Are you all right? —— ___ 选项:a、You’re welcome b、That’s OK c、I think so d、Take it easy选 C 你还好吧?---我觉得还可以。 再问： 第一个我后来也改A，可是答案还不对，无法解释这句话了？