Europe has achieved more in controlling the AIDS virus than Asia in the past ten years, ______ the number of people infected with the virus is going up sharply [ ]

ould report any incident, _____serious or minor it is

下列各句中加点词语使用恰当的一句是（ ）

I will certainly be surprised if he ______to tell them what he knows

You look so tired. You _____have stayed up late again. [ ]