Choose the correct “to be” auxiliary verb to complete each sentence.
#1. She ___ my best friend.
#2. They ___ playing football now.
#3. I ___ very tired today.
#4. We ___ ready for the test.
#5. The cat ___ sleeping on the sofa.
#6. You ___ a smart student.
#7. My parents ___ at home right now.
#8. He ___ watching TV in the living room.
#9. I ___ happy to see you.
#10. The students ___ studying English.
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