摘要：24．A moment, please．I'm checking if Mr. Smith free tomorrow． A．is B．being C．to be D．will be
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A moment, please．I'm checking if Mr. Smith _________ free tomorrow．
| A．is | B．being | C．to be | D．will be |
A moment, please．I'm checking if Mr. Smith _________ free tomorrow．
| A．is | B．being | C．to be | D．will be |
A moment, please．I’m checking if Mr. Smith _________ free tomorrow．
| A．is | B．being | C．to be | D．will be |
A moment, please．I'm checking if Mr. Smith _________ free tomorrow．
A．is B．being C．to be D．will be
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A moment, please．I'm checking if Mr. Smith _________ free tomorrow．
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| A．is | B．being | C．to be | D．will be |