No matter how hard the government has tried to search for it, the missing Malaysian flight MH370 is still nowhere _________.
He advised me to read an artile ___ reading ___ an American writer ___ senior Book 3.
Who is ___ the school?
The PLA man made a dive ___ the smoking box.
The naughty boy could hardly tell me the reason ___ being absent ___ school.
He had a hard time ___ supporting the family.