一、根据图片,补全对话。
1.
A: Where's the ?
B: It's the .
2.
A: Look at the bird.
B: It's the .

1. pencil; on; desk 2. behind; door

1. 观察第一幅图，铅笔在桌子上，A询问物品位置，所以第一空填表示物品的名词pencil；回答需用介词表示位置，“在……上”用on，“桌子”是desk，故后两空填on、desk。2. 观察第二幅图，鸟在门后面，“在……后面”用介词behind，“门”是door，故填behind、door。

二、连词成句。
1. dirty, window, so, The, is ( . )

2. the, follow, Please, rules ( . )

3. of, the, look, window, Don't, out ( . )

1. The window is so dirty. 2. Please follow the rules. 3. Don't look out of the window.

连词成句时，先根据标点判断句子类型，再结合英语句子结构排列单词，注意单词的大小写和句末标点。

三、给下列句子排序,使其连成一段通顺的对话。
A. (30 minutes later ...) Our classroom is clean now.
B. Me too! And I can clean the blackboard.
C. Let's clean it!
D. I can sweep the floor.
E. Look! Our classroom is dirty.
F. Yes. We should keep it clean.

E C F D B A

根据对话的逻辑顺序，首先指出问题：E（Look! Our classroom is dirty.）；接着提议打扫：C（Let's clean it!）；然后同意提议：F（Yes. We should keep it clean.）；再分别说明自己能做的打扫事项：D（I can sweep the floor.）、B（Me too! And I can clean the blackboard.）；最后说明打扫后的结果：A（(30 minutes later ...) Our classroom is clean now.），因此正确排序为E、C、F、D、B、A。