题干
Listening is just as ______ as speaking in language learning.
A：important
B：more important
C：most important
D：the most important
答案(点此获取答案解析）
A
Listening is just as ______ as speaking in language learning.
A：important
B：more important
C：most important
D：the most important
1AB：1Ab：1aB：1ab 
配子间16种结合方式 
子代中有9种基因型 
4种表现型（9：3：3：1）