With sufficient scientific information a manned trip to Mars should be _____.
Everyone wants to have a holiday,but you have no idea____tiresome it is to rest.
.I won’t let you in____you show me the written permission of themanager.
.What you told me is really true,____?
Jack said Betty had always been interested in geography,____?
Mr Wang must go to Beijing to vis I tMrs Brown today, ____he?