Though he said he was a doctor, , he knows nothing about medicine.
A. as a matter of fact
B. as well
C. as a result
D. as if
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(答案→)A. as a matter of fact
B. as well
C. as a result
D. as if
解析：考查词组：A. as a matter of fact事实上，B. as well 也，C. as a result因此，D. as if好像，句意：虽然他说他是医生，但是他对医学一窍不通。选A。