题目

病毒、细菌、真菌共有的特征是（） A . 个体都很微小 B . 一定含有机物 C . 无成形的细胞核 D . 均能引起传染病 答案：B------We all went to the cinema except you last night. Why didn’t you go?------Because I ________ it twice.A．have watchedB．had watchedC．would watchD．was watching