A.a...the...on the | B.a...X...on a | C.the...the...in the | D.the...X...in a |
A.X...the | B.a...the | C.a...X | D.X...X |
A.a; a | B.a; 不填 | C.the; a | D.the; 不填 |
A.a ; the | B.不填;the | C.a ;an | D.the ;an |
A.a; the | B.the; 不填 | C.不填; the | D.a; 不填 |
A.the; the | B.a; a | C.a; the | D.the; a |
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