68.After_____by the doctor, you are required to turn in the examination form.
答案解析
解析：
句中的 After 作介词,其后应跟名词、代词或动名词作宾语,因此可排除 A(C 两项。根据向意可知,
examine 和 you 之间为逻辑上的动宾关系,所以应用动名词的被动式,即“being+ 过去分词”的形式。故选D。
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