B.
years of practise(practise不可数）类似的years of hard work
expert原因开头加a.
It is know to all that it takes years of ( )practice to gain the skill of( )expert.
It is know to all that it takes years of ( )practice to gain the skill of( )expert.
Aa;the
B/;an
Ca;an
D/;a
Aa;the
B/;an
Ca;an
D/;a
英语人气：802 ℃时间：2020-09-15 18:29:59
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