题目内容
Mr wu is _______excellent teacher, he is always patient to help us.
| A．a | B．an | C．the | D．/ |
B
解析试题分析：句意：吴老师是位优秀的老师，他总是耐心帮助我们。a/an不定冠词，第一次提及时使用，an用于元音音标前，a用于辅音音标前；the第二次提及时使用；excellent优秀的，第一个音标为/e/，第一次提及，故选B.
考点：考查冠词的用法。
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