Нужно придумать предложение со словом are being introduced (внедряются) was being solved (решался) и 8 предложений со словом are becoming(становятся)

Russian spies are being introduced un the usa goverment.
Problem with power outage in our district was being solved week ago. 
Films are becoming more popular than books.
Her cookies are becoming more tastier.
Problems with global warming are becoming more serious.
People are necoming more tolerant.
My puppies are becoming more obedient.
Topics on english lessons are becoming more harder to understand.
tasks on exams are becoming more harder to solve.
Tangerines are becoming more popular in christmas eve.