题目内容

Both Alipay and WeChat are gradually laying ____ the face-scanning payment market.

A. down
B. in
C. out

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The convenience brought __________ mobile payment is obvious.

A. from
B. in
C. by

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A. from
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A. stong
B. strength
C. strengthen

Mobile payment often needs to be bound ________ the user's bank card

A. by
B. with
C. in

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