—Middle school students don’t know much about shopping online,______they?
—__________ . It’s very popular with teenagers .
A. do,No,they don’t
B. do,Yes,they do
C. don’t,No,they don’t
—Middle school students don’t know much about shopping online,______they?
—__________ . It’s very popular with teenagers .
A. do,No,they don’t
B. do,Yes,they do
C. don’t,No,they don’t
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