【小题1】We will turn off the lights for an hour on Earth Day.(对划线部分提问)
________ ________ we turn off the lights for an hour?
【小题2】 Shall we have a picnic at the weekend? (改为同义句)
________ ________ having a picnic at the weekend?
【小题3】“Will you please open the window?” she said to him. (将直接引语改为间接引语)
She ________ him ________ open the window.
【小题4】They kept on talking until the teacher came in. (改为同义句)
They didn’t ________ ________ until the teacher came in.
【小题5】 The new high-speed Hangzhou-Shanghai line started running last year. It cost about 29 billion yuan. (合并为含定语从句的句子)
The new high-speed Hangzhou-Shanghai line ________ ________ about 29 billion yuan started running last year.

This sign means cars and buses mustn't turn right here.（就划线部分提问）

Rewrite the following sentences as required(根据所给要求，改写下列句子。每空格限填一词)：

This sign means cars and buses mustn't turn right here. (对划线部分提问)

________ ________ this sign mean?