摘要：This pair of socks is worn out.I’ll have to buy a new . A.one B.ones C.pair D.pairs
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This pair of socks is worn out. I’ll have to buy a new ______.
[ ]
A. one
B. ones
C. pair
D. pairs
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B. ones
C. pair
D. pairs
This pair of socks ______ worn out. I'll have to buy a new ______.
| A．is, one | B．are, ones | C．is, pair | D．are, pairs |