一、根据句意、首字母和音标提示，写出句中所缺单词
1. The bird is making its nest with mud and little s.
2. My dog can solve some simple Maths problems. I think he is c!
3. Sometimes my cat likes to stay a in the room.
4. The fish is so quiet. It makes no (/saʊnd/) even when eating.
5. When you feel (/'ləʊnli/), you can go and chat with a friend.
1. The bird is making its nest with mud and little s.
2. My dog can solve some simple Maths problems. I think he is c!
3. Sometimes my cat likes to stay a in the room.
4. The fish is so quiet. It makes no (/saʊnd/) even when eating.
5. When you feel (/'ləʊnli/), you can go and chat with a friend.
答案：1. sticks
2. clever
3. alone
4. sound
5. lonely
2. clever
3. alone
4. sound
5. lonely
解析：
1. 结合句意“鸟用泥土和小物件做窝”及首字母s，可知应填stick的复数形式sticks（树枝）；2. 根据前句描述狗能解数学题，结合首字母c，可知填clever（聪明的）；3. 结合句意“猫喜欢独自待在房间”及首字母a，填alone（独自）；4. 根据音标/saʊnd/，对应单词sound（声音），符合语境；5. 根据音标/'ləʊnli/，对应单词lonely（孤独的），符合语境。
二、根据要求改写句子
1. My pet dog weighs about 4 kilograms. (对画线部分提问)
your pet dog ?
2. Please look after my pet well when I'm away. (改为同义句)
Please my pet when I'm away.
3. The parrot looks a little different. (改为一般疑问句)
the parrot a little different?
4. Jim needn't stay at home now. (改为同义句)
Jim stay at home now.
5. Put some stones at the bottom of the bottle. (改为否定句)
stones at the bottom of the bottle.
1. My pet dog weighs about 4 kilograms. (对画线部分提问)
your pet dog ?
2. Please look after my pet well when I'm away. (改为同义句)
Please my pet when I'm away.
3. The parrot looks a little different. (改为一般疑问句)
the parrot a little different?
4. Jim needn't stay at home now. (改为同义句)
Jim stay at home now.
5. Put some stones at the bottom of the bottle. (改为否定句)
stones at the bottom of the bottle.
答案：1. How much does; weigh
2. take good care of
3. Does; look
4. doesn't have to
5. Don't put any
2. take good care of
3. Does; look
4. doesn't have to
5. Don't put any
解析：
1. 画线部分是重量，用How much提问，主语是第三人称单数，助动词用does，谓语动词用原形weigh。
2. "look after...well"的同义表达是"take good care of"，符合同义句改写要求。
3. 一般现在时的句子，主语是第三人称单数，变一般疑问句要借助助动词Does，谓语动词look变回原形。
4. "needn't"表示“不必”，同义表达是"doesn't have to"，主语Jim是第三人称单数，助动词用doesn't。
5. 祈使句的否定形式是在句首加Don't，且some在否定句中要改为any。
2. "look after...well"的同义表达是"take good care of"，符合同义句改写要求。
3. 一般现在时的句子，主语是第三人称单数，变一般疑问句要借助助动词Does，谓语动词look变回原形。
4. "needn't"表示“不必”，同义表达是"doesn't have to"，主语Jim是第三人称单数，助动词用doesn't。
5. 祈使句的否定形式是在句首加Don't，且some在否定句中要改为any。