________restoration of ancient architecture,the Chinese government has invested a large sum of money on it.
In April,thousands of holidaymakers remained________abroad due to the volcanic ash cloud.
“Things________never come again!” I couldn’t help talking to myself.
Every one of us must know:________we live can we save the earth.
—Can those________at the back of the classroom hear me? —No problem.
Attracting _____ senior citizens, Florida is _____ home to the largest population of elder Americans.