As was introduced just now,workers are paid_____.A.by weekB.by the week请帮忙讲解下（鄙人高三党,拜托千万不要来误导的）

As was introduced just now,workers are paid_____.A.by weekB.by the week请帮忙讲解下（鄙人高三党,拜托千万不要来误导的）
As was introduced just now,workers are paid_____.
A.by week
B.by the week
请帮忙讲解下（鄙人高三党,拜托千万不要来误导的）

As was introduced just now,workers are paid_____.A.by weekB.by the week请帮忙讲解下（鄙人高三党,拜托千万不要来误导的）
by the week [按周（计算）] ---属习惯用法
又如：by the hour 按小时（计算）
没有by week这种表达法.
问题补充：那按年付款呢?---依此类推,--- pay by the year

by the week以周计 习惯用法 类似的如by the hour
by week 无此类表达