الحل طبعا Neither كده الجمله معناها ولا احد من اولياء الامور فى المنزل لانهم كانوا فى العمل

السلام عليكم الاجابة المناسبة Neither
وليس هناك مشكلة لغوية في are لانها مستخدمة لغويا ولكن غير رسمية قليلا
وشائعة في American English

You have to look at the book first then you can write the question correctly as it is found in the workbook p 58 number 30

both of my parents are at home today. it's a holiday
workbook page 58

Neither of my parents is / are at home .........

اجابتك صح يجوز ان يكون الفعل جمع عادى فالاجابة nither

No doubt it's a correct one - neither of is followed by a singular or a plural verb so nothing is wrong

Hi,everybody
:I'd like to contribute to the discussionthe informal language is a level of English that is acceptable in written and spoken language.It is not colloquial or slang
and if you remember, we teach students how to change emails into informal style
So standard language is used in special areas like speechesor news
Thanks

Hi,everybody
:I'd like to contribute to the discussionthe informal language is a level of English that is acceptable in written and spoken language.It is not colloquial or slang
and if you remember, we teach students how to change emails into informal style
So standard language is used in special areas like speechesor news
Thanks

You are completely right, sir.
We do teach formal British English. Yet, it is now common knowledge that curriculum specialists are between US and Cairo all year long, so they have an undisputed inclination to use American English.
Personally, I stick to the origin and claim it is a mistake in the course book no matter what students may say in the future when other teachers say it is true on the american way.