1. a: where's Janet? upstairs?
b: __________ tired, she went to bed earlier than usual.
a) having been feeling
b) having felt
c)being felt
d) feeling
답이 왜 d가 되는지 모르겠어요 b는 안되나요?
2. Have you ever heard abour a terrible disease ________ is still unknown?
a) which the cause of
b) which of the cause
c) of the cause which
d) of which the cause
답이 왜 d가 되는지 모르겠습니다
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