练习题

1) Force N1 _______________(比力N2大2.5倍).

2) This substance _______________(反应速度是另外那种物质的三倍).

3) The earth _______________(是月球大小的49倍).

4) The landlord _______________(想将租金提高三分之一).

5) They _______________(计划将投资增加一倍).

参考答案
1) is 2.5 times greater than Force N2

(考点：倍数 + 形容词/副词比较级 + than)

2) reacts three times as fast as the other one

(考点：倍数 + as + 形容词/副词 + as)

3) is 49 times the size of the moon

(考点：倍数 + 名词)

4) wants to raise the rent by a third

(考点：动词 + by + 数词/百分比/倍数)

5) plan to double their investment

(考点：double + 名词)