0408语法求助

lyq0612

多谢大家了！
26. [A]Because[A] it is often dependent [E]of[E] the conditions of crystallization, the composition of the

[C]minerals[C] in a rock can be important [D]in determining[D] the rock's geologic history.
KEY IS B.
32. Fats and fixed oils are greasy [A]or[A] waxy substance that ill [C]their[C] pure state are [D]normally[D] tasteless,

colorless, and odorless.
KEY IS B.
请问如何改正，那个ill是什么东西？
39.[A]During first[A] ten years of the Space Age, which began in 1957, more than 500 artificial

satellites were rocketed [D]into orbit[D] around the Earth.
KEY IS A.
疑惑主要在D，orbit岂不是没有限定词的可数名词了？

numberX

现在要熄灯了。，明天再看