She couldn’t        her words        by the students even if she repeated them once again.. 

---What’s that terrible noise?---The neighbors ____for a party.

—Have you heard about the recent election?—Sure, it _______ the only thing on the news over the last three days.

—You seem to be familiar with this city．—I       here for three years．It's great to be back．

Scientists say they have found a way to produce the human body’s own cancer-killing cells through gene treatment, ______ new hope to cancer sufferers.