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We need to assess this situation before we ________.
In Britain, some spellings are _________ from the USA.
The flowers had a wonderful _________.
Genetic __________ occurs within a species.
_________ is very important.
The cat only had one _______.
After the argument, he was in a ________ mood.
During space missions oxygen is _______.
The drummer hit the ______.
Cyanide is a very dangerous ________.