AIDS is said ______ the biggest health challenge to both men and women in that area over the past few years.
Lily asked ________seco nd question before Maria could answer_______first one.
Three of our players were ill, and, ________, our main scorer had broken his ankle.
—I’ve never found a better job. —________.
Ladies and gentleman, please fasten your seat belts! The plane ________.
Only when ________ be possible to sign the papers.