Complete the sentences with the correct form of...

Complete the sentences with the correct form of the verbs in parentheses.

a) Paris ________ (see) as the heart of La Belle Époque.

b) Two editions of the iconic architecture international exposition, the World's Fair, ________ (hold) in Paris in 1889 and 1900.

c) The Eiffel Tower ________ (become) one of the most remarkable structures of the fair.

d) The Parisian Métro, the subway system from Paris, ________ (design and plan) by Jean-Baptiste Berlier.

e) The decoration features in Métro's entrances ________ (influence) by Art Nouveau, and they are still protected as historical monuments.