the businessmen ------------ the price of meat three months ago

问题描述:

the businessmen ------------ the price of meat three months ago
so far,the price of meat ---------------------by several time.
中间怎么填,反正两个都是“升”,

第一个空是raised (提高价格需用动词raise,该处是一般过去时,应填写一般过去式动词)第二个空是has been raised.(so far 目前为止,做时间状语时,该句是典型的现在完成时态,价格提高,是被动语态,因此该空是现在完成...