A：甲乙两个水潭中的虹鳉种群因环境不同而产生了生殖隔离
B：狗鱼对甲水潭中虹鳉的捕食，使甲水潭中虹鳉种群的早熟基因的频率下降
C：虹鳉种群中如果没有新基因的产生，则不会发生进化
D：若将甲中的虹鳉和乙中的花鳉转移到一个新水潭中共同饲养，多年后虹鳉成熟个体的平均体重将会增加
I came to Australia last year and I ____ (落下) in love with it. I can see the ____ （明亮的）sunshine everywhere. At the beginning of this ____ (学期), I couldn't understand the teacher in class. Her English was quite different from what I'd heard in class at home. I;m____(幸运的) enough because my classmates are really friendly and helpful . It's____ (令人惊讶的) that I got an A last week. My science teacher is ____（也）good. She said that I was____ （勤勉的）. I dedided to work harder and get good ____（成绩）.After class I always play soccer with ____ (他们). This is a great ____ （机会）for me to study in Australia .
下列各句中，没有语病、句意明确的一句是（ ）
