__ into use in April 2012, the hotline was meant for residents reporting water and heating supply breakdowns.

Some aspects of a pilot’s job _______ be boring,and pilots often _______ work at inconvenient hours.

Most museums in the world keep things from the past _____ people should know about.

Wild animals have __________ living areas. Instead, the number of the farms is getting _________.

How long have you been studying in No.2 Middle School?—Less than half a year.—So it will be two years and a half _______ you graduate from this school.[ ]