_____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.
Ladies and gentlemen, due to an unexpected accident, one of the singers whom all of you ____ to hear ____ tonight.
“What you want, you ____ have it on condition that you get the best result,” said the boss.
. Take an active part in sports or other activities you enjoy ____ you can meet various kinds of people.
It is well-known that ____ year 2006 saw many developments in ____ science and technology, with those in the field of space science being particularly notable.
A writer has to ____ his imagination and experience to produce good works.