do you go to the Swimming Club? —Twice a week. [ ]

Mr. Wu___this math problem____him many times, but he still doesn’t understand it.

What a beautiful city our hometown is! There are many trees ___________ of the road! — Yes, and ____________ of the trees is growing larger and larger.

Yuan Longping is a scientist __________ is famous for the development of rice.[ ]

Where is Linda? I can’t find her anywhere.—She _______ Shanghai. She _______ there for a few days.