[ Tenses ]
Wake up! You _______for ten hours alredy.
A. sleep
B. slept
C. have been sleeping
D. has slept

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Grammar › ViewHe ___ a lot of new skills since he started at that company.
A. has learned
B. learned
C. learns
D. is learning
Grammar › View
What is the coordinating conjunction in the sentence?
Animals and humans can be mammals.
A. humans
B. Animals and humans
C. can be animals
