按要求改寫下列各句，每空一詞。

1．There will be less room for pigs, so meat will be more expensive．（改為同義句）

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

2．They have worked there since 1997．（對(duì)劃線部分提問(wèn)）

                 have they worked there?

3．The coat is very expensive．I can't buy it．（合并為簡(jiǎn)單句）

The coat is            expensive for me          buy．

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

          knows that robots             do a lot for people．

5．”Will you visit the museum?” He said to the girl．（改為間接引語(yǔ)）

      He           the girl if he           visit the museum．