题型:问答题 简答题 算一算。10+3=17-5=9+10=17-7=14-4=13+6=15-5=2+10=6+10=19-7=14+5=16-4=15-3=10+8=18-10=10+4=12+5=13-10=10+7=12+7= 查看答案
题型:问答题 简答题 We ___________ for a long time. Shall we play for a while?A.studyB.StudiedC.have studiedD.are studying 查看答案