根据要求完成句子。每空一词，含缩略词。

【1】毫无疑问，中国人最了解茶的本质。

____________ ____________, Chinese understand the nature of tea best.

【2】这所学校现今共有 3341 名学生。

There are 3341 students in the school____________ ____________now.

【3】We may put off the meeting because of the bad weather. (改为被动语态)

The meeting may ____________ ____________ off because of the bad weather.

【4】I think Rose likes rock climbing. (改为否定句)

I____________ think Rose____________ rock climbing.

【5】They have been friends for 10 years. (对划线部分提问)

____________ ____________ have they been friends?