急{きゅう}に vs.すぐに – usage in context


In 合格できる N3 (page 28), I found the following exercise:

> うちの子{こ}は新{あた}しいおもちゃ見{み}ると、( )ほしがる。
>
> 1. 急に 2. じっと 3.すぐに 4.しっかり

I have to fill in with the correct word. I think it's either 1 or 3, but I
don't know the difference between those two. I think that to some extent both
急に and すぐに can be understood as _immediately_.

In this context, which is the most appropriate word and why?




`急に` is like `suddenly` I think, this word includes the meanings of _without
notice_ or _unexpected_.

`すぐに` is immediately, as you mentioned.

The context describes the baby's general habit, so must be _expected_ things.
the answer is 3.`すぐに`.




`急に` is like `suddenly` I think, this word includes the meanings of _without
notice_ or _unexpected_.

`すぐに` is immediately, as you mentioned.

The context describes the baby's general habit, so must be _expected_ things.
the answer is 3.`すぐに`.

