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16. --Look at ____ animal. It’s interesting.
--Which one do you mean? ____ black one with a long tail?
A. an, The B. an, An C. the, The D. the, An
17. I\'ll go camping with you, if I ________ free tomorrow.
A. will be B. am C. shall be D. was
18. A friend of _____ came here yesterday.
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16. --Look at ____ animal. It’s interesting.
--Which one do you mean? ____ black one with a long tail?
A. an, The B. an, An C. the, The D. the, An
17. I\'ll go camping with you, if I ________ free tomorrow.
A. will be B. am C. shall be D. was
18. A friend of _____ came here yesterday.