Question

Good news! The price of all those second-hand goods is ________ before.

A．30% as lower as	B．30% lower than
C．lower 30% than	D．a(chǎn)s 30% low as

Answer 1

B

試題分析：倍數(shù)的表達(dá)：倍數(shù) + as + 形容詞或副詞的原級 + as + 其他；倍數(shù) + 形容詞（或副詞）的比較級 + than + 其他；倍數(shù) + the size / height / length / width. etc. + of + 其他。句意：好消息！這些所有的二手商品的價格比之前低30%。
點評：掌握倍數(shù)問題的固定結(jié)構(gòu)：比如表示A是B的幾倍長（寬，高，大，重等）” ：
1.“A + be + 倍數(shù) + as + 計量形容詞原級 + as + B”。如： This tree is three times as tall as that one.  His father is twice as old as he. 
2.“A + be + 倍數(shù) + 計量形容詞比較級 + than + B ”。如： The dictionary is exactly five times more expensive than that one. 
3.“A + be + 倍數(shù) + the + 計量名詞 + of + B ”。如： The newly broadened square id four times the size of the previous one. 
4.“The + 計量名詞 + of + A + be + 倍數(shù) + that + of + B ”如： The size of the newly broadened square is four times that of the previous one.