All of us have been to the park ________ because both of you are ill at home.
I had _____useful umbrella when it rained.
—Jim, remember to return this book by Friday. — .
The book won’t until the end of the year.
—Where would you like to go, Jinan or Qufu? — . I only want to go to Qingdao.
Rick has learned a lot about Chinese culture he came to China.