25. There are signs _____ more and more young people prefer to eat our rather than cook at home.
A. Where
B. Who
C. that
D. which
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26. Large numbers of drivers in China now depend ______ BeiDou for their routing directions.
A. on
B. with
C. for
D. to
27. We were unable to offer that service _______ we hadn't got sufficient personnel to cope with it.
A. although
B. till
C. unless
D. because
28. To meet the challenges, companies need to be _______ than before about how they recruit and retain workers.
A. as creative
B. most creative
C. creative
D. more creative
29. Actually, it was not until last month ______ the equipment we ordered arrived.
A. which
B. what
C. that
D. where