The moments you spend with us ______ you years of security and a brighter future.

A) have given

B) to give

C) will give

D) giving

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(C)

The moments( you spend with us ) ______ you years of security and a brighter future.

The moments  是主詞

(which) you spend with us 是形容詞子句

凡從屬子句中有數量詞(one.two,some, many, most),之後又有 of 時,之後均可置入關係代名詞 whom (代替人) 或 which(代替事或物),以引道形容詞子句,修飾主要子句中的先行詞.

1. Mr. Johnson has taught many students,some of whom have become great scientists.

2. I bought three cars, two  of which are yellow.

who,which +be +n. 可化简為先行詞的同位語 :非限定修飾的形容詞子句,若關係代名詞為主詞時,不可化簡為分詞片語:~~~~~~~~~~~

I met Peter, who is a good friend of mine.

=I met Peter,a good friend of mine.

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We regret to announce that Mr. Charles has resigned his position as senior sales manager, (which is ) effective next Monday.

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Due to the nurmerous job applications which were received for the supervisory staff position, it is likely that we will have to reject over half of them.

=Due to the numerous job applications received for the supervisory staff position,.....