It’s nice _____ you to ______ so much timeshowing me around your school.

means, butnone proved

In many American universities, the total work for a degree thirty-six courses, each for one semester(学期).

They forced ____ little children to workall day for so little money____ everyone couldn’t bear that.

It’s hard for him playing against me I’ve got nothing to play for, but for him, he needs to win so __________