The discovery of the new drug is of great significance to people ______ from H1N1.

 Though ______small talk, Roy managed to have lively conversation with strangers.

______ the project in time, the staff were working at weekends.

____ the distance was too far and the time was short, we decided to fly there instead of going there by train.

 _______ found by the police, the killer had to hide themselves in a mountain cave for two months.