下列选项中，属于留学贷款担保抵押方式的有( )。 Ⅰ．房产抵押 Ⅱ．银行存单质押 Ⅲ．国债质押 Ⅳ．信用担保

A．Ⅰ、Ⅱ

B．Ⅰ、Ⅱ、Ⅲ

C．Ⅱ、Ⅲ

D．Ⅰ、Ⅱ、Ⅲ、Ⅳ

--- Did your classmates have a good time in the Disneyland last weekend?

---Yes. They enjoyed _________ very much.

A．themselves

B．yourselves

C．ourselves

D．himself