问题补充:
Mr wu is excellent teacher, he is always patient to help us.
A. a
B. an
C. the
D. /
答案:
A. a
(答案→)B. an
C. the
D. /
解析: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.
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