What is the difference between 'familiarly' and 'familiar'?

[oat]

Test No. incompl/inter-17 "Eating Out", question 5

It is always more relaxing to eat in a restaurant where the faces of the staff are ......... and know everyone by name.

(a) familiarized
(b) familiar
(c) familiarly
(d) familiarity

Test No. incompl/inter-17 "Eating Out", answer 5

It is always more relaxing to eat in a restaurant where the faces of the staff are familiar and know everyone by name.

Correct answer: (b) familiar

Your answer was: incorrect
It is always more relaxing to eat in a restaurant where the faces of the staff are familiarly and know everyone by name.
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Why use " Familiar "?

please explain
oat

[Alan]

Familiar as the adjective is needed here. This means you recognize them.
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English as a Second Language
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[Yankee]

Has this test sentence lost the word 'you'?

It is always more relaxing to eat in a restaurant where the faces of the staff are familar and you know everyone by name.

As the sentence currently stands, it means "the faces of the staff know everyone by name." -- which is quite odd.

[Englishholic]

Although Amy pointed out the error over a year ago, the word "you" is still missing from the sentence.
Englishholic

[Torsten]

Hi Amy and Englishholic,

Many thanks for pointing these things. We've made the changes and they'll go online with the next update.
Regards,
Torsten
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary