单项选择题 (句子释义)The wretched boy never set foot upon a football field without scoring a goal.A. Each time this boy played football, he was sure to get the ball into the goal.B. This unfortunate boy never played football, as he couldnt score a goal.C. This boy was unhappy because he didnt kick the ball into the goal.D. If this boy didnt score a goal he would feel wretched.

单项选择题 生物质混燃发电至今无实质性的经济激励政策，主要原因是混入煤炭的生物质原料量较少。( )

单项选择题 The more words you are familiar with, the less you are aware of reading words and ________ you are aware of content and meaning.A. moreB. lessC. the moreD. the less