All of us have been to the park ________ because both of you are ill at home.
All the students agreed to go to Qingdao by ______ sea and camp by ______ sea.
—Would you mind _______ me solve it? —_______.
Amy ____ the school library. She ______ books three times a week.
—Could you tell us _______? —About five minutes.
Thank you for giving us some useful advice _______ how to deal _______ the problems.