A
an 加在以元音音素开头的名词前,如an orange
但useful [ˈju:sful]开头字母的发音不是元音音素.所以选A
Enlish is __useful language.We should learn it well.A.a B.an C.the D./
Enlish is __useful language.We should learn it well.A.a B.an C.the D./
英语人气：399 ℃时间：2019-09-27 18:52:17
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