He has worked in the city _______ three years ago while his wife has been here______only one month.
I want to get __________ about Qinghua University yesterday.
--- How can I learn English well, Miss Huang ?--- You should try ________ English every day.
--- What is Da Wei like?--- He is a tall boy ________ glasses.
My best friend is good at ________.
Beijing is one of ________ in China.