Tom has gone out. Tom _______. A. was out B. has been out C. is off D. will be out 说明:对不起,由于匆忙,原题中的 C选项打成了 is out,其实是is off, 很抱歉!另外,我说请专家再补充的意思没说清楚,我...
It can loosely be described as travel that takes place at regular intervals-often in an annual cycle-that may involve many members of a species, and is rewarded only after a long journey.
Television repairman was a common occupation.这句话中的主语是否应该用复数,如果不用复数也应是the+television repairman或a+television repairman表示泛指,但是这句话中的主语为什么只用单数,难道这里的telev...