i______ v. to suggest that sth. is true without saying this directly
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She followed the receptionist down a luxurious corridor to a closed door, ________ the woman gave a quick knock before opening it.
A. on which
B. but when
C. wherein
D. then
l______ adj. in a basic meaning of a word
i______ n. lack of interest or concern
q______ adj. having suitable knowledge or experience required for a particular job