29.The concert usually takes place at the hall,with the audi

29.The concert usually takes place at the hall,with the audience ___ on the ground.
A.seating B.seated C.be seating D.to seat
30.It’s high time ___.
A.we should leave B.we should have left C.we leave D.we left
33.Only recently ___ to deal with the problem.
A.has anything been done B.anything has been done
C.has anything done D.anything has done
35.___,health is more important than wealth.
A.In a word B.Overall C.Therefore D.But then
36.The book is dull.____ I read,____ I like it
A.The less…the less B.The more…the more
C.The less…the more D.The more…the less
40.The chair looks rather hard,but in fact it is very comfortable to ____.
A.sit on B.sit C.be sat D.be sat on