7. There’s somebody walking behind us. I think ………………. .
A. we are following B. we are being followed
C. we are followed D. we are being following
8. I still can not believe it. My bicycle ……………… some minutes ago.
A. was stolen B. was stealing C. stolen D. stole
9. The children’s arm was swollen because he ……………… by a bee.
A. stung B. had stung
C. had been stung D. had being stung
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