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

　　2) This substance _______________(反應速度是另外那種物質(zhì)的三倍).、

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

　　4) The landlord _______________(想將租金提高三分之一).

　　5) They _______________(計劃將投資增加一倍).

　　【答案】

　　1) is 2.5 times greater than Force N2

　　(考點：倍數(shù) + 形容詞/副詞比較級 + than)

　　2) reacts three times as fast as the other one

　　(考點：倍數(shù) + as + 形容詞/副詞 + as)

　　3) is 49 times the size of the moon

　　(考點：倍數(shù) + 名詞)

　　4) wants to raise the rent by a third

　　(考點：動詞 + by + 數(shù)詞/百分比/倍數(shù))

　　5) plan to double their investment

　　(考點：double + 名詞)