阅读下面短文，从短文后所给的A、B、C三个选项中选择能填入相应空白处的最佳选项。

Steven works in a farm tool factory. He and five of his friends are very interested (Example: (0) ) singing. So they have (41) a singing group which is called Happy Birds. They sing (42) songs both in Chinese and in foreign languages. They sing very (43) . The ot her workers and people (44) the villages around really like to h ear them (45) . Now New Year’s Day (46) here soon. The Happy Birds have been asked to (47) at different places. They’d (48) to go to all of them. (49) one friend has too much work and (50) may have to give up his holidays. The Happy Birds can’t sing without him.