Inspring,wecanoftenhearsomebirds 国语站 题库 9.54K 大中小设置文字大小 问题详情： In spring, we can often hear some birds_______ in our school. A. singing B. sing C. to sing D. sings【回答】B知识点：动词和动词短语题型：选择题 TAG标签：#
