Accommodate vs. accumulate

[Rich7]

Test No. errors/advan-6 "At the Conference", question 1

We left our booking for the event until the last moment and so the hotel could not accumulate all for of us.

(a) booking
(b) last moment
(c) accumulate
(d) us

Test No. errors/advan-6 "At the Conference", answer 1

We left our booking for the event until the last moment and so the hotel could not accommodate all for of us.

Correct entry: accommodate
The error was: (c) accumulate

You have found the error but your entry is incorrect.
We left our booking for the event until the last moment and so the hotel could not accumulate all for of us.
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could you please explain the whole meaning of this sentence? and is it correct "for of us"?

[Torsten]

Well, the meaning of the sentence is this:

There is a group of people who want to take part in an event (a seminar, a conference, a convention, etc.) which takes place in another town so they need hotel rooms in which they can stay. Now, because they wait too long the hotel doesn't have vacant rooms for all of them. The hotel cannot accommodate (provide rooms) for all the group members.
As for the phrase for all of us - thanks for pointing out, we'll amend that.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Rich7]

thanks a bunch for this explanation.

[sinbadnj]

Is accept also acceptable here?