fast/quickly

[sitifan]

The kids have to roll the eggs _______ and carefully to the finish line.
(A) fast (B) quickly
Which option is correct: A, B, or both?

[SirGod]

*Not a teacher

You must use an adverb. Both answers are correct.

[kgrzena]

No, no, no...things are fast, people perform quickly.

[kgrzena]

Remember it this way... I ran quickly to my fast car.

[5jj]

No, no, no...things are fast, people perform quickly.

That is an over-generalisation:

"Fast is more often used when you are talking about the speed that somebody or something moves at:
[...] You are driving too quickly."
(From the OALD)

[5jj]

Thanks! Now, maybe you can help me with farther and further! Despite my ridiculous education, never got them straight.

Please start a new thread for this question. We don't want to lead this thread off topic.

[bhaisahab]

In answer to the OP's question, "quickly" is correct in the context of his gap-fill exercise.

[henz988]

The kids have to roll the eggs _______ and carefully to the finish line.

(A) fast (B) quickly
Which option is correct: A, B, or both?

My rule of thumb:
FAST:QUICKLY = SPEED: TIME

And my extended explaination:
A plane can be fast, but an egg usually not (but it can roll fast, if you force it to). Even if a plane is on the ground and motionless, you can still say: “It’s a fast plane”
A quick plane needs only seconds to fly fast.
A man can move quickly and can also run fast.

IMHO, people usually use “fast” to describe the speed of an object as well as its “potential moving ability” while “quickly” is mainly used to refer to the time that people need in response to something. Of course, a quick object is often a fast one.

I think both A and B are correct grammatically because both “quickly” and “fast” can be used adverbially to modify the action “roll”
The kids have to roll the eggs quickly
The kids have to roll the eggs fast.

I won’t choose A just because it sounds like an adjective here and, especially, it doesn’t sound well with the adverb “carefully” .

A native of Chinese

[sitifan]

fast/quickly - WordReference Forums

[5jj]

In answer to the OP's question, "quickly" is correct in the context of his gap-fill exercise.

I think so too, but I am not sure that I can come up with a convincing reason for this choice. Can you?