题目

细菌、真菌等微生物在自然界中的主要作用是(   ) A.分解无机物        B.导致动植物和人患病     C.生产有机物       D.促进物质循环 答案：DThough he has studied          at English for ten months, he can still      _ speak the language.            [     ]A. hardly; hard         B. hard; hardly            C. hard; hard