The manager of the supermarket listened to the (complain) ____from the customers .
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There is always the (possible)____of an earthquake in the region, but so far there has been no sign of trouble.
(science) ____are often invited to give lectures to children to help themunderstand science.
The aid given by the U.S. government to the poor people in that area is rather (symbol) ____.
l regret (hurt)____your feelings at the party.