第二节 完型填空 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。 Li Lei works in a farm tool factory. He and five of his friends are very interested in 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 other workers and people (44) the villages around really like to hear 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. (41)