--Why has he been staying at home these days? --He ___________ since a month ago.
Now you may think the nation’s high unemployment rate is the_______for these leaders.However,that’s not the case.
_______is known to us all that the old scientist,for_____life was hard in the past,still works hard in his eighties.
The teacher called Tom to his office because he was caught_____in the exam.
The young writer_____his success to his teacher’s encouragement.
When you phoned me,I was having a meeting,otherwise I_______your call.