He missed  _______ when he was in Africa.

He hurried to the booking office only _____ that all the tickets had been sold out.

____ H1N1 flu from spreading, our government has taken some effective measures.

In the job interviews applicants often find themselves ______ unexpected questions, some very difficult to answer.

________from space, the earth, with water_____seventy percent of its percentage, looks like a “blue ball.”