_____to reach them on the phone, we sent an email instead.

Since her only child passed away a few years ago, family has been a ________ topic for her.

 Now I regret ______ those weight-loss pills. 

None of us think it any good _____ a contract with such a dishonest boss.

 Mr. Green stood up in defence of the 16-year-old boy, saying that he was not the one________ .