选择题4道

1.C中的表能力说的是现在。之前的WERE是虚拟语气。从句意分析，如果她不能唱歌不是事实，那么我会邀请她参加派对，很明显，说的是现在的能力。
2.在非限制性定语从句中，WHICH必须直接在谓语之前。因此ALL,BOTH之类的词应该提前。
3.我觉得也是选D，如果选A的话，应该是what is generally accepted is that water resources will become a problem of the most importance in the new century.
4.D选项是though是虽然，那么what has recently been done to provide more buses for people就成为了孤立的主语，这句从句就不完整了。而C选项，是介词结构，类似于BECAUSE OF STH，但不能说BECAUSE STHG。

1.the fact that she can't sing. 客观现实用一般现在时，不知道你们老师有没有讲过太阳月亮的例子。
2.肯定是D 你把which换成they读一下呢，they both are...读起来好还是both of them are...读起来好呢
3.我也觉得是D
4.though是连词 in spite of 是介词结构，连词后面能跟当代词的what？

1.与现在相反的虚拟语气（if...were,...would...)