___Mr. Smith is calling on the phone, sir.A．TheB．AC．OneD．An
题型：不详难度：来源：
| ___Mr. Smith is calling on the phone, sir. |
答案
| B |
解析
| 意为:某一位叫Smith的先生.文中没有物指,所以不选A. C和D填入句子不通. |
举一反三
____ horse is ___ useful animal.| A．A, an | B．The, the | C．A, the | D．The, a |
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| What ___ wonderful time we had yesterday! |
| Tom is ___ 8-year-old boy. |
It is believed that ______ European chemist called Felix Hoffmann first produced ASA which completely changed ______ man’s understanding of aspirin. | A．an; a | B．the; a | C．a; / | D．an; / |
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