25. Only by adopting the highest standards of integrity_______________the trust of our clients and the companieswe work with.
A)we earn
B) can weearn
C) we can earn
D) we willearn
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26.IfI ______________the challenges at that time, I might not have started my own business.
A)would know
B) have known
C)had known
D) will know
27. It was not until last July___________we started to distribute e-readers and launched ane-book store.
A)that
B)who
C)which
D)whom
28.__________the library for hours without finding anything useful, I turned to my professor for help.
A)To search
B)Having searched
C)Have searched
D)Searching
29.___________some degree,all managers who supervise peoplc are involved in HR activities.
A)On
B)To
C)For
D)With