29. - How is your English study?
Not bad. But I_______ learning English grammar.
A. am interested in B.
am good at
C. have a little trouble D. have no trouble
答案:C
[解析]考查固定短语的用法。have trouble doing sth.意为“做某事遇到了困难”;答语说“还不错。但是……”,由这个转折词可以看出说话人在语法学习上遇到了一定的麻烦,故答案选C。