---Oh, doctor, the wound on my leg is infected.---You really shouldn’t have left it _______ to the sun.
. . Many applicants stood outside the manager’s office, nervously waiting ______ for the job.
. Only through ______ talks can we build trust and only through cooperation can we create _______ win-win economic situation.
. . I thought she had retired, but ________ she hasn’t.
. --- I suggest we set up an out-of-class club. --- Great! That’s exactly what I ______.
. Can you imagine what problem may ________ when human beings are cloned?