At an international meeting, participating countries discussed how much oil theproducers (export) ____.
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The honest young surgeon admitted to (make) ____ errors in judgment on more than one occasion.
There are different types of buses (range)____ from 11 seats to 44 seats.
The manager of the supermarket listened to the (complain) ____from the customers .
There is always the (possible)____of an earthquake in the region, but so far there has been no sign of trouble.