[ Grammar and Vocabulary ]
The word “__________” refers to all the animals living in a particular region.
A. flora
B. ecosystem
C. fauna
D. environment
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Grammar › ViewThe birds _____ away from the tree when someone _______ under it.
A. fly , sits
B. flies , sits
C. flying , sitting
D. flew , sat
Grammar › View
They _________ the exercises every day.
A. is
B. do
C. did
D. does