Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Engineers have been dreaming of an underwater link between Britian and France since 1802. Finally, in 1994the Channel Tunnel( nickname” the Chunnel” by the English) was officially opened.This fifteen million dollar project took seven years to complete .It is 50km long and built 45 metres under the seabed. The trains which go through the Chunnel can travel at up to 300km/h due to the(31)_________ electrical system.

The journey from London to Paris via the Chunnel takes just three hours. It is also handy for drivers since they can load their cars onto the trains. They don’t need to book in(32)_________ ,as trains depart every few minutes.However, while on the train, there isn’t much to do and many criticise the Chunnel for this. Unlike the ferries, there is no duty- free shopping , no video game parlour or refreshment stand (33)_________ can you look outside and enjoy the view. As a result, many would find the Chunnel(34)_________ and would take the ferry(35)_________

Điền ô số 31