To save the drowning child, the boy plunged into the icy water without hesitation, ____ his own safety．
A．despite of B．regardless of C．unaware of D．because of
—It’s the office! So you ________ know eating is not allowed here．
—Oh, sorry．
A．must B．will C．may D．need
I called Hannah many times yesterday evening, but I couldn’t get through．Her brother ________ on the phone all the time!
A．was talking B．has been talking C．has talked D．talked
But for their help, we ________ the program in time．
A．can not finish B．will not finish
C．had not finished D．could not have finished
In peace, too, the Red Cross is expected to send help ________ there is human suffering．
A．whoever B．however C．whatever D．wherever
In just a decade, the company has been ________ from a family business to a large operation．
A．transformed B．transmitted C．transferred D．transported
