I called you several times this morning, but you didn’t answer.–Sorry. I ______ tennis the whole morning.

Either you or one of your students___to attend the meeting__ tomorrow.

Only after Mary read her composition the second time_________ the spelling mistake.

In April,thousands of holidaymakers remained_____abroad due to the volcanic ash cloud [ ]

Army personnel_____often forbidden to fraternize (与……友善) with the civilian population.