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1 . During the 3-minute exciting tour, please remain ___________ and avoid __________your seatbelt.
A.to be seated… to unlock | B.seated…unlocking |
C.to be seating…being unlocked | D.seating…unlocking |
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13-14高二上·上海·期中
2 . This field of scientific research remains________.
A.to be untouching | B.being touched |
C.to be untouched | D.untouched |
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