25.—Why not open the windows to let_____cool air in? —I'd rather you didn't_____air in our town is terribly polluted. A.a;The B/;The C./;/ D.the:/
The fact has worried many scientists ________the earth is becoming warmer and warmer these years.
The number of foreign students attending Chinese universities ________rising steadily since 2010.
Only then ________how much damage had been caused.
Memories ________on him as soon as he met the friend whom he had not heard from for over thirty years.
The shirt is so expensive. Can you reduce the price ________a third?