【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 _________.
【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.