Unit 3
1 other than 除了
work = be effective
2 seminar = a meeting where a group of people discuss about some academic problems
3 two by two = in pairs
4 complete = finish
four more weeks = another 4 weeks
As for all know, 4 weeks usually make up a month.
6 have Friday ff = have Friday cut from daily schedule = will not have any classes on Fridays
7 do one’s laundry = have one’s clothes washed and ironed
9 The word “picture” can be a verb meaning “imagine”.
10 第三类条件句 表示对过去事实的否定 （同Unit 2 -- 8）
could have been 对过去可能性的推测