1 . It is amazing that the hotel, ______ used to be an old castle, can ______(accommodation) 1,000 people at a time. (所给词的适当形式填空)

2 . Ted came for the weekend wearing only a pair of shorts and a T-shirt, ________ is a stupid thing to do in such weather. （用适当的词填空）

3 . The result was not the same as they had expected, ________ was rather disappointing. （用适当的词填空）

4 . Meanwhile, as the construction goes on, more roads will be built and the Metro system will be expanded, ________ can reduce traffic jams. （用适当的词填空）

5 . The film you see on the screen is the product of a huge amount of hard work, most of________ takes place behind the scenes. （用适当的词填空）