There ________ lots of trees on both sides of this street.But now they are all gone.

A．used to have

B．are used to be

C．used to be

D．are used to have

根据《证券法》的规定，禁止的证券交易违法行为包括（）

Ⅰ.内幕交易

Ⅱ.操纵证券市场

Ⅲ.证券承销与保荐

Ⅳ.欺诈客户

A.Ⅰ、Ⅱ、Ⅲ

B.Ⅰ、Ⅱ、Ⅳ

C.Ⅰ、Ⅲ、Ⅳ

D.Ⅰ、Ⅱ、Ⅲ、Ⅳ