Ⅰ. 根据首字母及图片提示补全句子。

(1) I found the schoolbag in the b______.
(2) Dad found Jack in the t______.
(3) Look! The k______ is very big.
(4) I found it in the l______.

(1) bedroom (2) toilet (3) kitchen (4) living room

(1) 观察插图1为卧室，首字母b，故填bedroom。(2) 插图2为卫生间，首字母t，故填toilet。(3) 插图3为厨房，首字母k，故填kitchen。(4) 插图4为客厅，首字母l，故填living room。

Ⅱ. 根据句意,用所给单词的正确形式填空。
(1) Lily ______ (win) the chess game and she was the winner.
(2) Let's ______ (play) in the playground.
(3) —Where did you ______ (find) Sam?
—I ______ (find) Sam on the bus.

(1) won
(2) play
(3) find; found

(1) 根据后半句“and she was the winner”中的“was”可知，该句时态为一般过去时，所以“win”要用过去式“won”。
(2) “Let's”后接动词原形，表示“让我们做某事”，所以“play”用原形。
(3) 第一个空，前面有助动词“did”，后面的动词“find”要用原形；第二个空，根据问句中的“did”可知，该句时态为一般过去时，所以“find”要用过去式“found”。

Ⅲ. 选择合适的单词和短语,补全对话。
find bought living room found matter
Dan is crying in his bedroom. He is sad ...
Tom: What's the ______?
Dan: Mum ______ me a new pen. But I can't find it now.
Tom: Don't worry. Let me help you.
Dan: Thank you.
Tom: Is it in the ______?
Dan: No, it isn't.
After ten minutes ...
Tom: Look, Dan! I ______ it!
Dan: Wow! Where did you find the pen?
Tom: I ______ it in your schoolbag. The pen is in the English book.
Dan: Ha ha ... Silly me!

matter, bought, living room, found, found

本题可根据对话的语境和所给单词的含义来选择合适的单词或短语补全对话。
1. “What's the matter?”是固定句型，用于询问“怎么了？”，根据上文“Dan is crying in his bedroom. He is sad”可知，Tom 看到 Dan 伤心在哭，会问“怎么了？”，所以第一个空填 matter。
2. “Mum bought me a new pen.”表示“妈妈给我买了一支新钢笔”，buy 的过去式是 bought，buy sb. sth. 是固定搭配，意为“给某人买某物”，符合语境，所以第二个空填 bought。
3. “Is it in the living room?”表示“它在客厅里吗？”，living room 是“客厅”，根据下文 Dan 的回答可知这里是在猜测钢笔的位置，所以第三个空填 living room。
4. “I found it!”表示“我找到它了！”，find 的过去式是 found，这里说找到了钢笔，所以第四个空填 found。
5. “I found it in your schoolbag.”表示“我在你的书包里找到它的”，描述找到钢笔的位置，所以第五个空填 found。