词语运用根据句意所给提示，补全单词或用单词、固定短语、固定搭配的正确形式填空。

1. The water is very s_____with much sugar in it.

2. He listened to the beautiful music with_____(please).

3. During that time, the population of the world_____(增长)slowly.

4. Weddings often take place in _____(教堂)in western countries.

5. I want to get a_____(专门地)trained dog to help me hl many ways in my daily life.

根据合同法律制度的规定，下列各项中，属于不得撤销要约的情形的有( )

A．要约人确定了承诺期限

B．要约已经到达受要约上

C．要约人明示要约不可撤销

D．受要约人已发出承诺的通知