Sentence Correction
试题详情
题目：
One of the earliest known birds with a beak and contour feathers, Confuciusornis sanctus, with large clawlike "thumbs" on its wings, which probably helped them to climb up to a launching position for flight.
选项:
A、with large clawlike 'thumbs' on its wings, which probably helped them to
B、with large clawlike 'thumbs' on their wings, which probably helped it to
C、had large clawlike 'thumbs' on its wings, which probably helped them
D、had large clawlike 'thumbs' on its wings, probably to help it
E、had large clawlike 'thumbs' on their wings, probably to help it
答案:
D
提问：
One of the earliest known birds with a beak and contour feathers, Confuciusornis sanctus, (with large clawlike "thumbs" on its wings, which probably helped them to) climb up to a launching position for flight.
A with large clawlike "thumbs" on its wings, which probably helped them to
B with large clawlike "thumbs" on their wings, which probably helped it to
C had large clawlike "thumbs" on its wings, which probably helped them
D had large clawlike "thumbs" on its wings, probably to help it
E had large clawlike "thumbs" on their wings, probably to help it
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