Millie’s research paper isn’t up to standard______ she has worked at it for two weeks.
句意：米莉的研究论文没有达到标准，尽管她已经写了两个星期了。
考查连词。since自从；unless除非；if如果；although尽管。“she has worked at it for two weeks”她已经研究它两周了，表达让步，用连词although引导让步状语从句，故选D。
Millie’s research paper isn’t up to standard______ she has worked at it for two weeks.
—Don't forget to protect your eyes well______ you take online classes.
—OK. Thank you, Sir.
_____ the outbreak of COVID-19 is a terrible blow to the country, the government is trying hard to bring the situation under control.
_______ you have problems, just let me know. I'll always be there for you.
We should protect the environment _______ we can make a better world to live in.
____ she is very young, she can take good care of herself.
________ Simon has done well in his studies, he still works really hard.
We will cause less pollution _________we can find ways to reuse or recycle more rubbish.
Many students hated to have classes on DingTalk, ________ they gave it one-star reviews（评价）.
______ he is dead, Kobe Bryant’s spirit will continue to influence us.
