用时间分词at，on，in填空，注意它们之间的区别。

　　(1)________ eight o'clock在八点钟

　　________ 4：00 p. m.在下午四点钟

　　________ noon在中午

　　________ night在夜里

　　(2)________ March 8在三月八日

　　________ Sunday在星期天

　　________ Saturday morning在星期五早上

　　________ New year's Day在元旦那天

　　________ weekends在周末

　　(3)________ May在五月份

　　________ summer在夏天

　　________ 2004 在2004年

　　________ the morning在早上

　　________ the afternoon在下午

　　________ the evening在晚上

　　________ the day在白天

完形填空

　Tom liked to find out how things worked very much.

　One morning when young Tom was five, he went out 　1　 his playmates. But no one was in the street. So he went to ask the boy of his neighbour (邻居). When he walked into the gate of the neighbour's, he saw they 　2 　breakfast. So he 　3 　wait out of the room.

　Suddenly he saw a hen (母鸡) sitting in an old basket by the window. He was 　4 　. Why was she sitting there? What 　5 　earth was she doing? He went over as he was thinking. The hen was frightened and ran away. Tom sat down and 　6 　carefully. He put his hands on the eggs. They were warm. After a while he saw a young chick climbing out of an egg. He understood that the hen was hatching (孵鸡). The 　7 　could make a chick 　8　 from an egg. So he ran home at once, took out some eggs, put them in a basket, sat on them and then began hatching. When his father saw this at noon, he asked 　9 　Tom was doing that for. Tom said 　10 　. Instead, he asked his father why he was not able to hatch chicks while hens could.