03-01-40

Dinaxie

40. Basalt, which composes most of the ocean floor, is a dark-grey rock rich in iron

A                    B                          C                                 D

and magnesium than most surface rocks.

为什么B most 不改成mostly?　 composes most of 与 composes mostly of 有什么区别吗？

记得03-10-15

15.Like Jupiter, Saturn is a large ,gaseous planet composed......of hydrogen and helium.

(a)it is mostly

(b)mostly

(c)almost

(d)both are almost

答案为B,

Cathelin

most of the ocean floor，    most of 修饰ocean floor表示很多。与composes没有关系。

15题目中的mostly是副词修饰composed，可以单独出来放在句末或是composed前。

总之，具体问题具体对待！>>