The noun 'staff' as a group of employees is: MCQ with Answer and Explanation

Explanation:
Piece of advice.

Explanation:
Traditionally 'dressmaker' or 'seamstress'. Many use 'tailor' for both.

Explanation:
'Hair' can be used as an uncountable noun: 'She has long hair.' But 'a long hair' could mean one strand. However, if she has long hair generally, no article. So 'She has long hair' is correct; 'a long hair' is incorrect if meaning general hair. So error at 'a'.