1.It isn't quite _____ that he will be present at the meeting.
[注释]I am sure that+从句。He is sure to come.=He is certain to come.但在it作形式主语,that引导主语从句时,主句中表语只能用certain,不能用sure.
2.Many new _____ will be opened up in the future for those with a university education.
[注释]opportunity常指“(难得的应抓住的)机会”,既可作可数名词,也可以作不可数名词用,如：I had few opportunities of meeting interesting people there.They had not much opportunity for hearing good music in the remote area.
3.The members of the club wouldn't run a _____ in entrusting(委托)the organization to an unreliable person.
[注释]run a risk(in)冒险：You are running a big risk in trusting him.
4.The meeting was _____ when the chairman fell ill.
A.put down B.shut out
C.cut short D.taken off
5.John says that his present job does not provide him with enough _____ for his organizing ability.
[注释]本题中scope(=opportunity;outlet)施展机会,发展余地,是不可数名词,如：Give someone scope to show his ability.Range意指“变动范围;视听范围;理解范围”,如：the range of prices(价格变动范围).