Read the following passage and mark the correct word or phrase that best fits each of the numbered blanks.

The English channel          

  Engineers have dreaming of an underwater link between Britain and France (21) ____ 1802 . Finally in 1994 the Channel Tunnel ( nicknamed “ The Chunnel “ by the English ) was (22) _____ opened .            This fifteen billion dollar project took seven years to (23) ____. It is about 50 km long and built  45 metres under the seabed . The trains which go through the Chunnel can travel at up 300 km/h due to the (24) _____ electrical system .            The journey from London to Paris via the Chunnel takes just three hours . It is also (25) _____ for drivers since they can load their cars onto the trains . They don’t need to book in (26) _____ , as trains (27) _____ every few minutes .            However, while on the train , there isn’t much to do and many (28) _______ the Chunnel for this (29) ______ the ferries , there is no duty-free shopping , no videogame parlou or refreshment stand (30) ______ can you look outside and enjoy the view . As a result , many would find the Chunnel unappealing and would take the ferry instead .A

  Engineers have dreaming of an underwater link between Britain and France (21) ____ 1802 .