题目

按要求完成下列句子, 每空一词1. My father is working on the computer now.  (对划线部分提问)    _________ _________ your father _________ now?2. Lucy often listens to English songs in the evening.  (改为现在进行时)   Lucy _________ _________ _________ English songs now.3. The birds are singing happily in the tree.      (改为一般疑问句)    _________ the birds _________ happily in the tree?4. My grandpa is drinking some milk in the kitchen.   (改为否定句)    My grandpa _________ _________ _________ milk in the kitchen.5. We can see a flag a关于遗传和变异的说法中正确的是A.遗传普遍性，变异不具普遍性B.遗传和变异都具有普遍性C.遗传和变异都不具普遍性D.遗传不具普遍性，变异具有普遍性