1÷（4+1），
=1÷5，
=20%；
故答案为：B．
We were all surprised when he made it clear that he ____ office soon.[ ]
A. leaves
B. would leave
C. will leave
D. had left
依据我国《继承法》的相关规定，口头遗嘱属于( )。
A．要式民事法律行为B．不要式民事法律行为C．要物民事法律行为D．附条件民事法律行为
