【单选题】to be the best one in the group, she had an opportunity to enter for the final competition.
【单选题】The group of dancers had rehearsed the dance until their movements were absolutely _________.
【多选题】临床实验室质量控制方法的评价和设计的工具有
【单选题】We had an anxious couple of weeks, ____ for the results of the experiment.
【简答题】The control group patients regretted not having had stem cell injections.
【单选题】--1 missed the early bus and I had to______ the next one on such a cold morning. --Bad luck !
【单选题】The rival group ______ held to the peace agreement they had signed.