被喻为“拯救人类的最后一次机会”的2009年世界气候大会在（）召开。
A、中国北京
B、丹麦哥本哈根
C、南非德班
D、卡塔尔多哈
参考答案：B
—Sorry indeed, I ______ to your birthday party if. . .
—Forget it. I know you were out on business. [ ]
A. must come
B. should come
C. can have come
D. would have come
下列哪项不是自身免疫性疾病（）
A.系统性红斑狼疮
B.急性胰腺炎
C.硬皮病
D.类风湿性关节炎
E.重症肌无力
