after(),as usual ,you will be required to have a test .括号里应该填什么?A being interviewed B been interviewed ...为什么?

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after(),as usual ,you will be required to have a test .括号里应该填什么?A being interviewed B been interviewed ...为什么?
after(),as usual ,you will be required to have a test .括号里应该填什么?A being interviewed B been interviewed ...为什么?

after(),as usual ,you will be required to have a test .括号里应该填什么?A being interviewed B been interviewed ...为什么?
选A. after是介词,后边必须跟ing形式.