用方框内所给的单词的正确形式填空．

They decided to make a bike trip to find the ________ of the Yellow River.

用方框内所给的单词的正确形式填空．

In order to fight the enemy more effectively, we must get ________ at once.

用方框内所给的单词的正确形式填空．

Everyone is given five minutes. So you must tell one of your most adventurous experience ________.

用方框内所给的单词的正确形式填空．

He lives in somewhere out in the ________ of Scotland.

根据句子的意思，用括号内所给单词的适当形式填空．

We all ________ (sincere)hope your father will be well again soon.

根据句子的意思，用括号内所给单词的适当形式填空．

The President and the Secretary of State are government ________ (official).

根据句子的意思，用括号内所给单词的适当形式填空．

I shall love you as long as I ________ (breath).

根据句子的意思，用括号内所给单词的适当形式填空．

Many houses destroyed by the floods have been ________ (rebuild).

根据句子的意思，用括号内所给单词的适当形式填空．

All of us enjoy the ________ (beautiful)of nature.

把下列句子合并成含有定语从句的复合句，每空一词，使意思基本不变．

He changed his mind at the last moment. This made us very angry.

He changed his mind at the last moment, ________ ________ ________ very angry.