---What’s the matter with Tim? ---Oh. Tim’s cellphone was left in a taxi accidently, never _____ again.
According to the police, _______ some facts undiscovered.
Recent pressure at work may________ his behavior. A.accounts for B. pay for C. stand for D leave for
The twin towers fell down. It looked_____ a huge piece of chocolate had been melted down(溶化).
The money is to be used________the poor.
The traditional view is _______ we sleep because our brain is “programmed” to make us do so.