问题
选择题
| 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
答案：B
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| 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：B