He is the only one of those clerks ________ to the important conference.
| A.who was inviting | B.who were invited |
| C.who has been invited | D.who have been invited. |
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He is the only one of those clerks ________ to the important conference.
| A.who was inviting | B.who were invited |
| C.who has been invited | D.who have been invited. |
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