Question

Сделайте следующие предложения вопросительными:
He is often sent business abroad. (Who?)
These books are sold everywhere. (Where?)
Professor Brown is usually asked a lot of questions after his lecture. (When?)
Payment is made against shipping documents. (What?)
Tickets for planes are booked in advance. (How?)

Answer 1

Who is often sent abroad? Where are these books sold? When professor ask? What paynament is made

Answer 2

Who is often sent business abroad?
Where are these books sold?
?
What is made against shipping documents?
How are booked tickets for planes?