请问这几道英语填充题的正确答案，为什么？

1. I tried ( ) my E-mail to my friend several times, but I failed. Maybe something was wrong with my computer.
A. to carry B. carrying C. to send D. sending

2. My brother used to ( ) the school football team.
A. be in B. joined C. be on D. being among

3. A little girl with blue eyes smiled at us ( ) when we entered the Children’s Restaurant.
A. friendly B. lively C. pleasantly D. lovely

4. Mother often ( ) of my grandparents.
A. says B. tells C. speaks D. talks

1.D
try doing sth.尝试做某事
我试着发了几次电子邮件给我的朋友，但是都失败了。可能我的电脑有点问题了。
2.C
是队里的一员用on；used to do 过去的行为。
我兄弟曾经是学校足球队的。
3.C
动词用副词修饰，此处只有pleasantly是副词，其余都是形容词。
当我们进入儿童餐馆的时候，一个蓝眼睛的小女孩朝我们愉快地微笑。
4.C
speak of 提及
我父母经常说起我的祖父母。

1. I tried ( c) my E-mail to my friend several times, but I failed. Maybe something was wrong with my computer.
A. to carry B. carrying C. to send D. sending
send email发邮件，try to do是努力尝试做某事，try doing是试着做某事

2. My brother used to (c ) the school football team.
A. be in B. joined C. be on D. being among
过去是在足球队里,用on,used to do是过去...

3. A little girl with blue eyes smiled at us (a ) when we entered the Children’s Restaurant.
A. friendly B. lively C. pleasantly D. lovely
向我们笑了，应该是友好的

4. Mother often ( ) of my grandparents.
A. says B. tells C. speaks D. talks
speak of提起，只有speak 才能跟of 搭配

我觉得是这样。。。

1.D
try to do尽力去做某事，有成功的暗示