Bill has made great progress __________the help of his teachers.
A: for
B:with
C: under
注意:1)词数100左右
2)可适当增加细节,以使行文连贯
3)开头和结尾已给出,不计入总数.
参考词汇:汉字拼写大赛:Chinese Character Spelling Contest
Dear Jane,
I'm Li Hua.
Li Hua
在生长有较多藻类的池塘中,常常看到鱼在黎明时浮头甚至跳出水面的现象.“鱼浮头或跳出水面”是因为( )