After a long vacation, Mike came back _________.
Will you see to _____ that my children are taken good care of while I am away?
— What is your new friend like? — ________.
So difficult ________ it to live in an English-speaking country that I determined to learn English well.
— Why didn’t you come to Mike’s birthday party yesterday? — Well, I _______, but I had something important to do at the moment.
Look at the timetable. The flight to Shanghai _______ off at 10:00.