一、单项选择（20分，每题一分）
（ ）1.—How often does your sister surf the internet?
—About .
A. three time B. three times C. three time every day
D. three times a day
（ ）2. —When is your father going to Hong Kong?
—He is going there July 28th.
A. on B. at C. in D. to
