You have to consider a company structure when _______ your own business.
A. start
B. starting
C. to start
D. started
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Once customers come to rely _______ these systems, they almost never take their business elsewhere.
A. on
B. at
C. of
D. by
Detailled preparation must be ______ before you sign a contract.
A. talked
B. looked
C. carried
D. done
It is with the help of Tom ______ our team has completed the project ahead of time.
A. which
B. what
C. that
D. when
This trade war will ______ tens of millions of jobs and many factories.
A. collect
B. affect
C. react
D. detect