(2013·安徽师大附中高三七模)Don't use water to put out the fire if oil catches fire. As is known, oil ________ float on water.

—Can you tell me where to spend your winter holiday?—I’m not sure. We      go to Yangzhou.

—Where ________ I meet you tomorrow morning?—I haven't decided the place.But I'll call you soon. 

  —The winner is a tall and thin boy with glasses!—Well，it________ be Mike.  He doesn’t wear any glasses.

The manager commanded that the work ____ finished by the end of this month.