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【单选题】
What two seasons of the year does Sam like?A.
spring and summer
B.
spring and fall
C.
fall and winter
D.
fall and summer
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反馈参考答案：
举一反三
【简答题】根据现代组织设计原则,举例说明其在组织设计中的应用。
【简答题】A driver should __ the road when . A．concentrate on; drive B．concentrate in; driving C．concentrate to; drove D．concentrate on; driving
【单选题】Never concentrate all your attention on one or two problems, ______ others.
A.
swarm with
B.
do away with
C.
to the exclusion of
D.
think nothing of
【单选题】We must ___ on our study..
A.
concentrate
B.
concentrate at
C.
concentrate on
D.
concentrate with
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