21£®Many people are not_______the danger of their children’s bad habits,which lead to failing to make their dreams e true.
A. well aware to B.very aware of C.aware that D.well aware of
22.They ________drinking although they are drivers,which is very dangerous both to them and to the passengers.
A. give up B.devote themselves to C. quit D. abandon themselves to
23.Dorothy was always late for school,_______,of course, made the teacher unhappy.
A. who B.which C. what D.that