—How are you today?

— ——Oh，I     asill as I do now for a long time．

A．didn’t feel   B．wasn’tfeeling    C．don’tfee  D．haven’t felt

单项选择题Old McDonald gave up smoking for a while，but soon to his old ways． A．returned B．returns C．was returning D．had returned

单项选择题中国的地势西高东低，可划分为三级阶梯。第一级阶梯是有着“世界屋脊”之称的_______________。 China's terrain is high in the West and low in the East, which can be divided into three steps. The first step is called roof of the world . it is ( ) A、黄土高原The Loess Plateau B、青藏高原Qinghai Tibet Plateau C、内蒙古高原Inner Mongolia Plateau D、云贵高原Yunnan Guizhou Plateau