—Some Chinese students find it difficult to understand native speakers when in London．
—Exactly, they've learned a lot about grammar and known many words.
A. if only
B. now that
C. even if
D. as if
网友回答
A. if only
B. now that
(答案→)C. even if
D. as if
解析：考查状语从句的连接词。句意：——有些中国学生在伦敦发现很难听懂那些母语是英语的人。——非常对！即使他们已经学习了很多的语法，认识了很多单词也是如此。If only要是……就好了； now that既然； as if好像; even if 即使。选C。