The hurricane damaged many houses and business buildings;______,it caused 20 deaths.
— The traffic is too heavy. Would you like me to help you the street? — That’s very kind of you.
Scientists _______ a lot of experiments on animals, hoping to find and effective way to cure the patients who had AIDS.
Putting in a new window will ______ cutting away part of the roof.
Mr. Smith was so angry at all _____ Bill was doing ______ he left.
–He didn’t feel a bit nervous when _____. --No. He’d spent a lot of time _____ for it after all.