___has recently been done to provide more buses for the people ,a shortage of public vehicles remains a serious problem .
Once ___, it can never be forgotten.
--Has he passed the exam yet? ---No,He ___ it if he had studied harder.
The little girl ___ out in the dark at night.
Since nobody is here, the meeting will be delayed until tomorrow. The underlined word means ___.
Once there live a king ___ Scolomon.