It seems that the students devote much time and energy _____ a high score in the exam.
Don’t promise anything ________ you are one hundred percent sure.
--- What did the teacher say to you just now?--- She asked me _______________.
He has finished writing his new book and it will __________soon.
--- Excuse me sir, where is Room 301?--- Just a minute. I’ll ask Bob ________ you to your room.
--- Are you coming to Jeff’s party? --- I’m not sure. I _______ go to the concert instead