. Jane Goodall with her assistants for the forests to learn more about the chimps.A. are

问题补充：

. Jane Goodall with her assistants for the forests to learn more about the chimps.

A. are setting off

B. is setting off

C. have set off

D. sets off

答案：

A. are setting off

(答案→)B. is setting off

C. have set off

D. sets off

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