Question

Fill in the blanks in the following sentence with the appropriate pair of prepositions below.

Nous marchons ____ restaurant ____ banque.
A. à la/au
B. au/au
C. du/à la
D. du/de la​

Answer 1

With locations, you will use the preposition à = to/in + [a place] and de = from + [a place].

See also Using 'à' (to/in) and 'de' (from/of) with cities (prepositions)

However, when followed by the definite articles le or les, these prepositions "contract" with them to form one word.

Answer 2

Nous marchons du restaurant á la banque.
Hope it helps.