I called you last night, but no one answered me.—Oh, I________ a shower.

he man came in,gun in hand, we all stood there, ________

For all the crowds at World Expo 2010 in Shanghai,the people lined up at every entrance and entered the exhibits________.[ ]

.In an effort to maintain social balance, the Chinese government several years ago _______a policy of encouraging college graduates to take official positions in rural areas.

Until the noise of the bus ________, we were able to hear the program again.[ ]