【题目】Through efforts, they harvested ______ corn than they had planned.
A.twice as much
B.twice more
C.more twice
D.as twice much
在线课程【答案】B
【解析】
考查倍数表达。句意：经过努力，他们收获了比原计划多一倍的玉米。根据下文corn than they had planned 可知应用结构“A+be动词/谓语动词+倍数+形容词/副词比较级+than+B”，表示“A 比B 大（长、高、宽等）多少倍”。故选B。