The passage focuses on .
A. why Pepperberg decided to carry out the experiment
B. how Pepperberg proved her theory abottt animals' thoughts
C. the new way of communication Pepperberg proposed
D. the problems that Pepperberg faced in the experiment
第1题:
carry的复数
carries
第2题:
44______.
A. Began
B.stopped
C.forgot
D.decided
第3题:
第4题:
A. figure…out
B. try…out
C. carry … out
D. work… out
第5题:
第6题: