Difference between in short and briefly

[me]

Test No. incompl/advan-4 "Newspaper Headlines", question 8

In ......... nothing much happened at the meeting.

(a) quick
(b) briefly
(c) short
(d) shortly

Test No. incompl/advan-4 "Newspaper Headlines", answer 8

In short nothing much happened at the meeting.

Correct answer: (c) short

Your answer was: incorrect
In briefly nothing much happened at the meeting.
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what?s the main difference between using short and briefly?

[Torsten]

Hi there,

You can either say in short or briefly but not in briefly.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary