根据句意，写出单词的正确形式。

Sam ________(usual)listens to China Radio International at 7 o’clock．

根据句意，写出单词的正确形式。

She ________(fly)a kite on the playground, didn't she?

根据句意和提示写出单词，完成句子。

Last year our school held the 12th School Art and Culture Festival ________(success)．

根据句意和提示写出单词，完成句子。

My parents looked ________(angry)at me because I made so many mistakes．

根据句意和提示写出单词，完成句子。

The Great Wall attracts thousands of ________(visit)every year．

根据句意和提示写出单词，完成句子。

By the end of the ________(twenty)century, computers had become more popular in china．

根据句意和提示写出单词，完成句子。

Animals are our friends, so ________(protect)them is our duty．

根据句意和提示写出单词，完成句子。

The food was good but the ________(serve)was very slow．

根据句意和提示写出单词，完成句子。

We had no ________(choose)but to prove that we were at another place at that time．

根据句意和提示写出单词，完成句子。

He ________(更喜欢)to play football when he was ten．