____is one of the four great inventions of ancient China.

When will the 70th anniversary ceremony for our school ________? All the students and teachers are waiting for it.— Well, in my opinion, at 9 am.[ ]

_ opinions on the schedule, we finally reached on agreement.

_______ are you from —I’m from Shanghai.

I haven’t seen Li Lei these days. He was said _____ tothe hospital to receive treatment.