A.0,2AA: 0,6Aa: 0,2aa.
B.0,16AA: 0,48Aa: 0,36aa.
C.100% AA.
D.100% aa.

A.undergo
B.continue
C.suffer
D.overcome

A.change
B.changed
C.changeable
D.changing

A.change
B.changed
C.changeable
D.changing

A.has been
B.have been
C.will be
D.are

A.same
B.similar
C.different
D.various

A.accidentally
B.suddenly
C.quickly
D.slowly

A.complete
B.find
C.compete
D.exist

A.where
B.which
C.when
D.what

A.where
B.which
C.when
D.what