按要求改写下列各句，每空一词。

1．There will be less room for pigs, so meat will be more expensive．（改为同义句）

          there will not be             room for pigs, meat will be more expensive．

2．They have worked there since 1997．（对划线部分提问）

                 have they worked there?

3．The coat is very expensive．I can't buy it．（合并为简单句）

The coat is            expensive for me          buy．

4．Everyone knows that robots can do a lot for people．（变成否定句）

          knows that robots             do a lot for people．

5．”Will you visit the museum?” He said to the girl．（改为间接引语）

      He           the girl if he           visit the museum．

Robots can do a lot of things. They are very ________.

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根据下面提供的对话情景，从下列7个选项中选择正确答案，使对话连贯、完整。其中有两项是多余的。

A：Today we are going to talk about a great invention．It looks like a human being．  1 

B：It’s a robot．  2 

A：Of course not．The first robot was invented in 1921．

B：  3 

A：Sure．They can take the place of humans to do some boring work．They can also do a lot of dangerous work instead of humans．

B：  4 

A：No．Robots can do a lot of work instead of people in many ways，but people wouldn’t be replaced by robots．  5 

B：We get it．