He is not very confident and always _______ before making a decision.

To the surprise of many people, in ten years the city’s population _______ by 12%.

What we all know is that new technology is being ________to almost every industrial process.

(安徽省马鞍山市2009届高三第一次教学质量检测)The brackthrough       by scientists in Shanghai,gives hope to cancer patients all over the world 

The secretary has _____to the related guests all the invitations to our company’s celebration.