--This pair of shoes looks very pretty.
--Really! Why not ________?
| A．to try them on | B．try on them |
| C．try them on | D．to try on them |
--This pair of shoes looks very pretty.
--Really! Why not ________?
| A．to try them on | B．try on them |
| C．try them on | D．to try on them |
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