Question

complete a frase: They haven't been to London.................. last year. The museum has been closed ................ two months. Pam has worked in that agency ... April.

Answer 1

Na ordem: 
in - for - on
Mas não tenho certeza da primeira.

Answer 2

they havent´t to london in last year.
the museum has beem closed for two months
pam hads worked in that agency on april.