单项选择题 In no way ______ weather over large areas of the world. A．we can control B．can we controlled C．can we control D．we control

单项选择题 痰涂片阳性检出率最高的肺癌是( ) A．大细胞癌 B．小细胞癌 C．腺癌 D．鳞状细胞癌 E．细支气管肺泡癌

单项选择题 What ______ doing when ______ into the office? A．were you; came the boss B．were you; the boss came C．you were; did the boss came D．you were; the boss came