The question discussed yesterday involves pollution.将其改成定语从句时,定语从句用什么时态？1.The question that was discussed yesterday involves pollution2.The question that has been discussed
involves pollution这两种变法哪个对？
...nd chatter in a coffee
shop—significantly outperformed the other groups. Since the effects were small,
this may suggest that our creative thinking does not differ that much in
response to total silence and 85 decibels of background noise.But since the
results at 70 decibels were significant, the s...
...quot;that Dr. Mortimer is a successful, elderly medical man, well-esteemed since those who know him give him this mark of their appreciation."老师，为什么这么难的，红色部分的如何理解，还有它的句子成分？它的主语呢，还有could后面省略了什么了？
______ he gets such high mark in mathhe has ______ hard so long, since last termA. why, been workingB. how come, been workingC. how, worked问题1：现在完成时和现在完成进行时不是都可以表示“一直”这个含义吗？如 I have lived here for 3 years.问题2：how come =wh...