【练习一】
一e since doctor poison open
二cbbcab
三 taught married swimming came have been have lived was
【练习二】
一ges seen in fact marry with north
二y ourselves don't until has been married has get big change
三dbba
【练习三】
一ible service although attraction present
二. have since How many When buy Have cattied
三 --been didn't--hasn't to--去掉 but--去掉 already--yet
四e to has been opened 不会 how to get It's to read 不会 but came have kown
is foud of
【练习四】
一CBAABC
【练习七】
二BBACAA
【练习十】
一DBADC
【练习十一】
二BCDBB
【练习十六】
二BBBBACAAAC
