At last，we found ourselves in a pleasant park ________trees providing shade(荫凉)and sat down to eat our picnic lunch．

A．for     B．from         C．of       D．D. with

票据到期日或交易到期日如遇法定节假日顺至下（）工作日。

A.一个

B.两个

C.最多两个

D.三个