Miss Bell joined the search-and-rescue team when she was

The driver drove _______ hit at a big tree and the car came to s stop.

When did the great earthquake in Wenchuan happen? — It happened ______ 2:28 ______ the afternoon of May 12, 2008. [ ]

Don’t talk to Mary like that, she is only____ eleven-year-old girl.

Pollution is a serious problem. Scientists have _____ some good ways to save it.