—Dad, I can’t open my e-dictionary in my computer.—You can _____ the computer and try again.
Lao She is famous _______ his play _______ a writer.
—_______ do you talk to your teacher at the School Air? —Once a week.
A library with two hundred thousand books _______ to the school last year.
The customs in America are different _______ those in China.
We visited Beijing University _______ the first day of our trip.