(B) Visiting the magnificent libraries. (D) Cycling in narrow streets.
16. (A) There are many visitors there. (C) There are many old streets there.
(B) There are many students there. (D) There are many bicycles there.
17. (A) He thinks the city is too crowded. (C) He thinks the streets are too narrow.
(B) He likes the place very much. (D) He admires the comfortable life of the students there.
