积极的课堂气氛是_____、热烈而深沉、宽松与严谨的有机统一。
参考答案:恬静与活跃
单项选择。
Lily and Lucy are twins. They ______. [ ]
A.look like
B.look like the same
C.look the same
D.looks like
大气污染可能导致失明和呼吸道疾病。()
A.正确
B.错误