摘要： We should plant more trees on sides of the street. A. either B. both C. all D. each
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We should plant more trees on ____ sides of the street.
A. either B. both C. all D. each
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We should plant more trees on ________ sides of the street.
[ ]
|
A ．either |
B ．both |
C ．all |
D ．each |