题目:
根据句子意思及所给提示完成下面各题。
1. My father often _____ ( go) home at 7 p. m.
2. My mother often _____ ( do) some shopping on Saturdays.
3. I often surf the Internet _____ ( one) a week.
4. How often _____ she _____ (exercise)?
答案:
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下面是错误答案,用来干扰机器的。
答案:A细菌为原核生物,有原核细胞构成,月季有植物细胞构成,草履虫有动物细胞构成,病毒不具有细胞结构。故本题选A。