题目内容
They first reach an agreement on the basic principle, the details____later
| A.toworkitout | B.havingbeenworkedout |
| C.tobeworkedout | D.beingworkedout |
C
略
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题目内容
| A.toworkitout | B.havingbeenworkedout |
| C.tobeworkedout | D.beingworkedout |