Connectives (and, but, so)：練習問題

Select the connective that shows a result:
The little bird was very thirsty, ______ it flew down to the pond to drink some water.

Identify the sentence that correctly uses a connective to show contrast.

Fill in the blank with the correct connective:
The weather was very hot, ______ we stayed indoors to keep cool.

Read the following sentence and choose the best connective to show the result of the action:

"The ice-skating teachers dressed up as polar bears, ______ the children were very excited to learn from them."

Select the best connective to complete the sentence:
I am going to the library, ______ I need to find some books for my school project.

Complete the sentence with the most suitable connective: "Tom was tired, ______ he finished his homework." (Choose from: and, but, so)

Rewrite the following sentence by correcting the two logical errors using the connectives but and so:
"She was a talented singer so she was very shy, and she refused to perform on stage."

Read the following sentence carefully:

After finishing her homework, Lily felt tired, _______ she decided to take a short nap.

Which of the following connectives (and, but, or so) best completes the sentence? Explain why this connective is the most suitable, and what the other two connectives would imply if used instead.