be careful with/ be careful of

be careful with/ be careful of

问题补充说明：Be careful____ the paper. it _____ easily. A. with; tears B. of; is torn C. with; breaks D. of; is broken

选C

becarefulwithsth.小心（做/处理）某物，与

becarefultodosth.小心做某事差不多,例：

Becarefulwiththeegg./Becarefultotaketheeggtothekitchen.

becarefulofsth.对某事/物持小心/谨慎态度，例：

Becarefulofyourfinger

itbreakseasily它很容易破。是指纸本身的特点,不用被动态。