David was responsible and hardworking, _
题型:选择题
问题:
David was responsible and hardworking, _____ he was promoted from a clerk to a manager.
A.which
B.as
C.for what
D.for which
David was responsible and hardworking, _____ he was promoted from a clerk to a manager.
A.which
B.as
C.for what
D.for which