题文
The Smiths usually have ____________ picnic in the park on Sundays.
| A． |
a |
B． |
/ |
C． |
the |
D． |
an |
The Smiths usually have ____________ picnic in the park on Sundays.
| A． |
a |
B． |
/ |
C． |
the |
D． |
an |
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