单选题 No matter (however) hard he (tries), he never (seems) able to finish his work (in time).
【正确答案】 A
【答案解析】[解析] 本题考查no matter+特殊疑问词的用法。however不是特殊疑问词，而是副词，一般放在句首、句中、句末表示转折。此处用however是误用，因此选择A。改为how。