题文
--I like the black trainers．Can I ?
--OK，here you are!
| A．try it on | B．try them on |
| C．try on it | D．try on them |
--I like the black trainers．Can I ?
--OK，here you are!
| A．try it on | B．try them on |
| C．try on it | D．try on them |
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