None of us expected the chairman to ______ at the party. We thou

None of us expected the chairman to ______ at the party. We thought he was still in hospital.
A、turn in
B、turn up
C、turn over
D、turn down
F、 
【正确答案】：B
【题目解析】：turn in交上，归还，告发  turn up出现；turn over翻转；turn down把声音调低句意：我们谁也没有料到主席会在晚会上露面。我们以为他还在医院。