（2015·江苏）Much time ________sitting at a desk, office workers are generally troubled by health problems.
A.being spent B.having spent
C.spent D.spending
By reading the story, you may understand ______ to be successful.
A.it takes what B.you take what C.what takes you D.what it takes
Only if a teacher gives permission _________ to enter the room.
A.a student is allowed B.is a student allowed
C.does a student allow D.a student allowed
The education of _______young is always _______ hot and serious topic in modern society.
A. the; / B. a; the C. /; the D. the; a
He didn’t recognize the man who hit him because he could just ____ a dark shape moving towards him.
A.make out B.turn out C.set out D.put out
— Henry doesn’t seem to be what he was.
— No. _______ so much in the war has made him more thoughtful.
A.Seen B.His seeing C.Having seen D.To have seen
