After two years’ research, we now have a __________ better understanding of the disease. 

Passengers will likely face the usual struggle to get their tickets during festivals, __________ at railway stations, where long lines are expected. 

The latest model of camera can           brings the object into focus, with which even a child can shoot very well．

—The poor weather was _________ responsible for the crash.—I’m with you on that. Carelessness was also to blame. 

—When did you first meet Tom?—The first day I came to this city，________，on May 2.