Sara is responsible for ____________the guests in the reception.
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We can do nothing except_________.
A. waiting
B. wait
On _________ the news, he didn’t know whether to laugh or to cry.
A. hearing
B. to hear
He said he was clever enough_________ with it by himself.
A. to deal
B. dealing
Without anyone _________, he slipped through the window.
A. noticing
B. notice