当基类本身也是某一个类的派生类时，底层的派生类也会自动继承间接基类的成员，称为继承的( )
A．规律性 B．传递性C．重复性 D．多样性
参考答案：B
An advertisement is useful in ________ it lets customers know of the kinds of goods in the shops.
A．that
B．which
C．what
D．whether
Because he works in a remote area, he visits his parents only ______.
A．occasionally
B．partly
C．practically
D．once
