It is know to all that it takes years of ( )practice to gain the _英语解答

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

人气：395 ℃　时间：2020-09-15 18:29:59

解答

B.
years of practise(practise不可数）类似的years of hard work
expert原因开头加a.