A.Attend all the classes at night.
B.Schedule all the classes before noon.
C.Set them at 8:30 a.m.every mornin9.
D.Put them from 9:50 a.m.t0 3:10 P.m.
A.By doing funny tricks.
B.By keeping humans busy.
C.By serving their owners.
D.By playing with their owners.
A.He seldom uses one word orders.
B.He uses words like a 2.5 year old.
C.He is Coren’S favorite subject for study.
D.He shows a high level of language ability.
A.It is as good as an ape’s.
B.It is close to human’S.
C.It leaves a lot to be studied.
D.It helps them keep their toys.