A. branch B. textbook C. virtual D. anyone A. unfortunately B. form C. wealth D. free of charge A. mainly B. talk quietly C. bring D. forty-six A. vibration B. entire C. mahout D. properly A. stairs B. by means of C. thousands of D. crude A. psychologically B. borrow C. up to standard D. certainly A. pork B. sadness C. website D. rail A. laughter B. human race C. store D. family tree A. quickly B. lend C. in need of D. invasion A. cook meals B. tragic C. go skating D. mail