A：a so well-paid job
B：such a well-paid job
C：so a well-paid work
D：such a well-paid work
小冬兰家养了a只黑兔，养的白兔比黑兔只数的4倍还多2只．养了____ 只白兔．
—Yes, it's a major way of _______ for them.
