The group’s research has done much to our knowledge of the HIV virus.
_____ his arrival at the village of the crows, he found his at the point of death.
_______ is watching the TV. Turn it off, will you?
____ with any common sense can tell the difference between the two.
— Hi, Michelle, I can’t find my e-dictionary. — Sorry, I it. I guess I put it on the top shelf with my things.
— When can I come for the computer? I need it next Tuesday. — It ________ be repaired by next Monday afternoon.