all of them are strong candidates only one will be chosen for the post.(·陕西 19)A. Sin

问题补充：

all of them are strong candidates，only one will be chosen for the post.

(·陕西，19)

A. Since

B. While

C. If

D. As

答案：

A. Since

B. While

C. If

D. As

解析：B

解析句意为：尽管他们都是很有实力的求职者，但是只有一个人会被选中担任这一职位。since因为，既然；while尽管；if如果；as因为。根据句意选while。