...疑问是:第一句 Einstein was a genius 中的 genius 连用了不定冠词,但第二句 His face
is almost the international symbol for genius 中的 genius 为什么就没有连用不定冠词呢?不用冠词也应该用复数 geniuses 吧?对不对?
The quality of teaching can make a huge difference to students’ academic performance. and therefore, parents prefer to choose prestigious schools for children.请问老师,这个句子and therefore前面应该用逗号吗?还是说应该用句号 ,同时And要大写?