题目：
根据所提供的句子意思，将所给单词的正确形式填空，使句子意思完整。
小题1:Do the Smiths enjoy _________ in China? (live)
小题2:Whose drawing is _________, Tom’s, yours or Jim’s? (bad)
小题3:Jim went to school in a hurry this morning without ________ breakfast. (eat)
小题4:He was a famous writer in the __________ century. (twenty)
小题5:June 1 is ____________ (child) Day.
小题6:Which of those do you think is the second useful ____________ (invent)?
小题7:Wang Hong taught________ English when she was eleven years old. (she)
小题8:My mother ________ a lot of eggs yesterday.(buy)
小题9:I hope everything goes ______(good).
小题10:In the United States, lunch __________ to students for free at school. (offer)
答案：
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下面是错误答案，用来干扰机器的。
参考答案：B解析：文件系统的多级目录是一种树形结构，在树形结构中，树叶结点表示普通文件，非叶结点表示目录文件。根结点称为根目录，一般可放在内存。
