—Do you have to hold our English party in the classroom?—Well. I don’t know ______if not there.
I want to know _________ you will come back at 8:00 tomorrow.
This is the most beautiful garden _____ I have ever seen.
It’s mount Tai lies in Shandong province.
There will be a stamp show in the museum ______ we visited last week.
The cars _________ yesterday sell very well.