用适当的介词或副词填空1.They came in one____another so as not to take u
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1.They came in one__after__another so as not to take up time.2.A lot of homework prevented me__from___joining you last night.3.I dug_for___some useful materials for my composition.4.Can we find the best way_to_solving this serious problem?5.A good leader is always in close contact with the broad masses__of_the people.6.___in___the process of learning to help others,learning to understand others,one learns to help and understand oneself.

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