单项选择题

Here ______ a pen, a few envelopes and some paper for you.

A．is
B．are
C．be
D．being
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单项选择题
You should never ______ your promise to a child.
A．go back on
B．go after
C．go in for
D．go over
单项选择题
If the electricity goes off, we have candles ______ in the closet.
A．in stock
B．in reserve
C．in store
D．on hand
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