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.
One feels a certain sympathy for Captain Cook on the day in 1778 that he discovered Hawaii.此句话给出的怎么翻译是 提到库克船长在1778年发现夏威夷岛的那一天，人们都会感到惋惜。请问这句话中on the day in...
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...
Ifthat’s hard to understand, let’s keep it as simple as the arugula at the backof my refrigerator. Mike Curtin sees my arugula storyall the time — but for him, it’s more like 12 boxes of donated straw...
Thank you for having taken so much trouble to help.和Thank you for taking so much trouble to help.有什么区别，前面那一句是动名词完成式的被动语态？还有上面句子的句子成分解析，特别是to help作什么成分？...