The family is a cooperative enterprise for which it is difficult to _____ rules, because each family needs to work out its own ways to deal with its own problems.
#81076
A
set up
B
put down
C
keep up
D
lay down
推荐题目
These tress ________ and also ____________. 
#71076
A
need trimming(修剪); need to water
B
need to trim; need watering
C
need trimming; need watering
D
need be trimmed; need be watered