25. Anyoneworks in the retail business needs to be good at calculating and communicating.
A. which
B. whom
C. who
D. what
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31. Effective feedback is well timed so that the employee can (easy)connect the feed- back with his actions.
32. Today, as natural resources become scarcer and manufacturing costs rise, recycling is (important) than ever.
33. With the work (do), these scientists began to plan another research project.
34. For social robots to work successfully, they have to (accept)by humans.