It has been more than five years ______they met last time in Wuhan.
A. since
B. before
C. for
D. until
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Here are some tips to help you stay safe when _____(use) ride-hailng apps.
If you couldn't keep the ______(appoint),please inform us as early as possible.
There is something wrong with the printer, and I'll have it _______(repair).
The project turned out to be _____(easy)than we though because we had support of many people.