27.Let' s move all the products into the hall and_____them in a proper order.
AIDS is said__________the biggest health to people in that area over the past few years.
With a lot of problems ________, the newly – elected headmaster is having a hard time.
Soon after getting off his horse, the man appeared at the second storey windows, ___________he could see nothing but trees.
Tom was very angry about ________ to Mary’s birthday party.
You can come here to ask me _____ if you have any questions.