为什么填a,怎么不填the?In 1778,Banks was elected president of the Royal Society,___position he hel
问题描述：
为什么填a,怎么不填the?In 1778,Banks was elected president of the Royal Society,___position he hel
In 1778,Banks was elected president of the Royal Society,___position he held for 42 years.为什么填a,怎么不填the?
答
逗号后的最后部分作president的同位语,不表示特指无需用定冠词.