The us economy might have suffered a deeper downturn had the government not taken effective economy measure.
參考答案:有错误，应该为Because the government not taken effective economy measure,the us economy might have suffered a deeper downturn .
The us economy might have suffered a deeper downturn had the government not taken effective economy measure.
參考答案:有错误，应该为Because the government not taken effective economy measure,the us economy might have suffered a deeper downturn .