1)we don't want( )any classmates falling behind.
a.there being b.there to being c.there to be d.there is

2)i must make full use of the time( )to me and do as much as i can for the people.
a.being left b.to leave c.left d.leaving

3)it is not uncommonfor( )problems of communication between old and young.
a.there to be b.there being c.there to being d.there be




谢谢解答涅~！

1)we don't want( )any classmates falling behind.
a.there being b.there to being c.there to be d.there is

C，同意楼上want sb.to do sth.的讲法。

2)i must make full use of the time( )to me and do as much as i can for the people.
a.being left b.to leave c.left d.leaving

left是leave的过去分词（这里的leave是及物动词），这句话省略了that is，补全是这样：
I must make full use of the time (that is) left to me and do as much as I can for the people.
注意leave的意思：
n.许可, 同意, 请假, 休假
vt.离开, 动身, 剩下, 遗忘, 委托, 遗弃
vi.出发, 离开, 生叶, 动身

3)it is not uncommonfor( )problems of communication between old and young.
a.there to be b.there being c.there to being d.there be

it是形式主语，真正的主语是后面的句子：there being problems of communication between old and young
原来应该这么说：There being problems of communication between old and young is not uncommonfor（这个词是不是打错了？）.
为了避免头重脚轻，所以用形式主语代替真正的主语。

“有问题”原来是there are problems，由于在这里作主语，所以要把谓语动词改成非谓语动词。如果你要问为什么只能是there being，而不能是there to be，那我就不知道怎么解释了，反正就是这么说的。